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Delta "K" Down Belay Jacket

Delta "K" Down Belay Jacket
Delta "K" Down Belay JacketDelta "K" Down Belay JacketDelta "K" Down Belay JacketDelta "K" Down Belay JacketDelta "K" Down Belay JacketDelta "K" Down Belay JacketDelta "K" Down Belay JacketDelta "K" Down Belay JacketBurnt orange (colour option for Ultrashell outer fabric)Charcoal (colour option for Ultrashell outer fabric)Purple (colour option for Ultrashell outer fabric)Red (colour option for Ultrashell outer fabric)Green (colour option for Ultrashell outer fabric)

"PHD ... make fantastic hooded down jackets that provide huge levels of protection (the PHD Delta for example)."
Andy Kirkpatrick.

Delta "K" Down Belay Jacket

A box-wall, down-filled jacket for exceptional warmth on bitterly cold, dry belays. Designed especially for challenging days on classic mixed mountain routes and technical steep water-ice. Now also available in custom sizes.
Typical Operating Temp:-20°C (-4°F)
Weight:485g (17oz)
Price:£561.00

Available Options:

Sizing type:
Because our custom-sized clothing is personalized specifically for you, it is non-returnable and can take up to 45 working days to make & dispatch
Body Width:
Body Length:
Arm Length:
Size:
Colour:

Features

  • A PHD K Series product: Ultimate warmth / weight ratio
  • PHD's Unique 1000 fillpower down
  • Water-resistant Ultrashell outer fabric
  • Ultralight 10X inner fabric
  • Box-wall construction for warmth
  • Front closure - 2 way YKK Aquaguard water-resistant zip with bottom locking stud
  • 3 insulated pockets:
    • 2 zipped waist level pockets
    • 1 zipped chest pocket
  • Integral hood with wired peak, sized for a modern climber's helmet:
    • Adjustable front cord with ends tethered inside the hood
    • Wired peak
    • Volume reducer on back of hood
  • New: Now available in custom sizes: specify Body Width, Body Length, and Arm Length independently*****
  • Reflector tape on front and back for night location
  • Clip loop to secure jacket at change-overs
  • Double exit adjustable hem cord
  • Cuffs: adjustable Velcro tab, to go over or under gloves
  • Drop-tail back
  • Stuff sac
  • Packed size: 17cm x 28cm*

 

*Please note: We make our stuff sacs big enough to allow fairly easy stuffing rather than reducing the jacket to the tightest minimum.

 

Description

This K Series product has been created for one single reason, to take warmth-for-weight performance to the limit of what's possible. Unique 1000 down, super-light materials, and specific design features mean that the word Ultralight now applies to this wide range of gear that will take you to the Poles as well as on a Sahara Marathon. More on the K Series...

This jacket is now also available in custom sizesSpecify Body Width, Body Length, and Arm Length independently to order a made-to-measure belay jacket. This tailor-made service can cope with sizes from XXXS to XXXL and is ideal if your chest/waist to height and/or arm ratios differ from standard, ready-to-wear patterns. 


As steep water ice and mixed test pieces get increasingly technical, so must the kit for the climbers who tackle them: that’s why we designed the Delta “K” Jacket.

However the routes may develop, protection from the cold on frozen stances is still a must, but for modern fast-and-light ascents, so is a good fit, the freedom to move, and minimal weight for maximum warmth.

This exceptionally warm belay jacket houses our unique 1000 fillpower down in box-wall construction, allowing maximum loft and delivering a TOT* rating of -20°C: very reassuring while belaying on frozen waterfalls.

Minimal features and a trim fit mean the Delta can be used in classic belay mode – over the harness when you stop moving – or under the harness for light, easy movement while climbing in deep cold. A fully adjustable, helmet-compatible hood is a given on a serious belay jacket; we’ve teamed it with a high front zip to provide maximum warmth and lock out gnarly conditions. Although clean and uncluttered, there’s no compromise on technical function: features such as high-viz reflective strips for location, glove friendly zip pulls and a clip loop to secure the jacket at change-overs make for a high-spec mountain workhorse.

Down filled Belay jackets really come into their own in dry cold, but obviously the conditions can change: water-resistant protection comes in the shape of Ultrashell fabric and YKK Aquaguard zips, to guard against damp snow or dripping ice if the temperatures rise. If you know you’re heading for wetter conditions though, take a look at our Primaloft filled Belay Jackets.

Please note: this jacket is designed and sized to be worn over the top of outer layers. It provides additional warmth on cold belays and can be swapped between climbers at pitch change-overs. If you want a trimmer, more athletic fit select the next size down.

*TOT: Typical Operating Temperature

Outdoor photography: Paul Horsman.

Please note: If you order a custom-sized version of this jacket it will take longer (approximately 45 days) to be manufactured ready for dispatch. Custom-sized versions of this jacket are not returnable and customer loyalty discount cannot be applied.

Technical

Ultrashell (weight: 40gsm)

The lightest of PHD's coated materials. This ripstop nylon provides complete wind block and good water resistance at minimal weight. Ultrashell gives an excellent upgrade to performance with very little weight penalty.

Ultralight 10X fabric (weight: 26 gsm)

10X, PHD's First 10 Denier Fabric. 9,000 metres of the yarn used to weave 10X weighs just 10g, that's about the same as a £1 coin! For all its thinness 10X is amazingly downproof and with reasonable care will go on giving you good service for years.

1000 Fillpower Down

This rarest of all downs we reserve for the K Series. European goose down of unique quality. 1000 provides the highest warmth-for-weight performance possible from down. More on our down insulation.

Sizing

Standard Sizing

The PHD Sizing Chart below is based on measurements without clothing, exactly the way you would buy a shirt or a sweater. A 42" (107cm) chest means that your bare chest uninflated measures 42". Inside Arm is measured from armpit to wrist-bone.

Size Height Chest Waist Inside arm
XS 155-163cm
(5'1"–5'4")
86cm
(34")
71cm
(28")
46cm
(18")
S 164-170cm
(5'5"–5'7")
91cm
(36")
76cm
(30")
48cm
(19")
M 171-178cm
(5'7"–5'10")
99cm
(39")
84cm
(33")
51cm
(20")
L 179-186cm
(5'10"–6'1")
107cm
(42")
91cm
(36")
53cm
(21")
XL 187-193cm
(6'2"–6'4")
114cm
(45")
99cm
(39")
56cm
(22")

Custom Sizing

Once you've selected a Body Width you can choose Body Length and Arm Length up to two sizes bigger or smaller. For example, a jacket with a medium (M) Body Width can be XS, S, M, L, or XL in Body Length and XS, S, M, L, or XL in Arm Length. If you have any questions about your size, please contact us.

Body Width. Use the chart below to find your Body Width. Measure yourself without clothes, relaxed with an uninflated chest.

Body Width Chest circumference Waist circumference
XS 86cm (34") 71cm (28")
S 91cm (36") 76cm (30")
M 99cm (39") 84cm (33")
L 107cm (42") 91cm (36")
XL 114cm (45") 99cm (39")


Body Length -- can be two sizes up or down from Body Width. Use the chart below to find your Body Length size. Measure your height without shoes:

Body Length Size
Your height in cm Your height in inches
XXXS 139 - 144cm 4'5" - 4'8"
XXS 145 - 154cm 4'9" - 5'
XS 155 - 163cm 5'1" - 5'4"
S 164 - 170cm 5'5" - 5'7"
M 171 - 178cm 5'7" - 5'10"
L 179 - 186cm 5'10" - 6'1"
XL 187 - 193cm 6'2" - 6'4"
XXL 194 - 201cm 6'4" - 6'7"
XXXL 202 - 209cm 6'8" - 6'10"


Inside Arm -- can be two sizes up or down from Body Width. Inside Arm is measured from armpit to wrist-bone without clothes. When you measure your inside arm let your arm hang loosely by your side. Don't extend it horizontally.

Inside Arm cm Inches
XXXS 41cm 16"
XXS 43cm 17"
XS 46cm 18"
S 48cm 19"
M 51cm 20"
L 53cm 21"
XL 56cm 22"
XXL 58cm 23"
XXXL 61cm 24"

N.B. PHD clothing is unisex.

Notes:

  • Down Jackets are sized to fit over thermal underwear & fleece.
  • Shell Jackets are sized to fit over thermal underwear & fleece or light down clothing (e.g. Minimus Jacket): to cover thick down clothing, go up one size.
  • The arms of our outdoor jackets are designed to be long enough to keep your wrists warm when your arms are extended horizontally (when using trekking poles, for example) or when you are reaching above yourself (when climbing, for example). In this respect the arm lengths of our jackets differ from street/fashion jackets.

Reviews

Reviews relate to previous Delta Belay Jacket, not this brand-new version

"PHD ... make fantastic hooded down jackets that provide huge levels of protection (the PHD Delta for example)."
Andy Kirkpatrick.

"The Delta Belay jacket you made for me has a totally bulletproof feel about it that puts my old Patagonia DAS Parka to shame. The hood is superb and the sizing is perfect to go on over my normal winter climbing gear."
Chris W.

"I've been using your Delta belay jacket for a couple of years and really like it."
Jeff Ingman.

"This is a lovely piece. It's badass protection."
Petesy (a.k.a. Peter Macfarlane).

Features

  • A PHD K Series product: Ultimate warmth / weight ratio
  • PHD's Unique 1000 fillpower down
  • Water-resistant Ultrashell outer fabric
  • Ultralight 10X inner fabric
  • Box-wall construction for warmth
  • Front closure - 2 way YKK Aquaguard water-resistant zip with bottom locking stud
  • 3 insulated pockets:
    • 2 zipped waist level pockets
    • 1 zipped chest pocket
  • Integral hood with wired peak, sized for a modern climber's helmet:
    • Adjustable front cord with ends tethered inside the hood
    • Wired peak
    • Volume reducer on back of hood
  • New: Now available in custom sizes: specify Body Width, Body Length, and Arm Length independently*****
  • Reflector tape on front and back for night location
  • Clip loop to secure jacket at change-overs
  • Double exit adjustable hem cord
  • Cuffs: adjustable Velcro tab, to go over or under gloves
  • Drop-tail back
  • Stuff sac
  • Packed size: 17cm x 28cm*

 

*Please note: We make our stuff sacs big enough to allow fairly easy stuffing rather than reducing the jacket to the tightest minimum.

 

Description

This K Series product has been created for one single reason, to take warmth-for-weight performance to the limit of what's possible. Unique 1000 down, super-light materials, and specific design features mean that the word Ultralight now applies to this wide range of gear that will take you to the Poles as well as on a Sahara Marathon. More on the K Series...

This jacket is now also available in custom sizesSpecify Body Width, Body Length, and Arm Length independently to order a made-to-measure belay jacket. This tailor-made service can cope with sizes from XXXS to XXXL and is ideal if your chest/waist to height and/or arm ratios differ from standard, ready-to-wear patterns. 


As steep water ice and mixed test pieces get increasingly technical, so must the kit for the climbers who tackle them: that’s why we designed the Delta “K” Jacket.

However the routes may develop, protection from the cold on frozen stances is still a must, but for modern fast-and-light ascents, so is a good fit, the freedom to move, and minimal weight for maximum warmth.

This exceptionally warm belay jacket houses our unique 1000 fillpower down in box-wall construction, allowing maximum loft and delivering a TOT* rating of -20°C: very reassuring while belaying on frozen waterfalls.

Minimal features and a trim fit mean the Delta can be used in classic belay mode – over the harness when you stop moving – or under the harness for light, easy movement while climbing in deep cold. A fully adjustable, helmet-compatible hood is a given on a serious belay jacket; we’ve teamed it with a high front zip to provide maximum warmth and lock out gnarly conditions. Although clean and uncluttered, there’s no compromise on technical function: features such as high-viz reflective strips for location, glove friendly zip pulls and a clip loop to secure the jacket at change-overs make for a high-spec mountain workhorse.

Down filled Belay jackets really come into their own in dry cold, but obviously the conditions can change: water-resistant protection comes in the shape of Ultrashell fabric and YKK Aquaguard zips, to guard against damp snow or dripping ice if the temperatures rise. If you know you’re heading for wetter conditions though, take a look at our Primaloft filled Belay Jackets.

Please note: this jacket is designed and sized to be worn over the top of outer layers. It provides additional warmth on cold belays and can be swapped between climbers at pitch change-overs. If you want a trimmer, more athletic fit select the next size down.

*TOT: Typical Operating Temperature

Outdoor photography: Paul Horsman.

Please note: If you order a custom-sized version of this jacket it will take longer (approximately 45 days) to be manufactured ready for dispatch. Custom-sized versions of this jacket are not returnable and customer loyalty discount cannot be applied.

Technical

Ultrashell (weight: 40gsm)

The lightest of PHD's coated materials. This ripstop nylon provides complete wind block and good water resistance at minimal weight. Ultrashell gives an excellent upgrade to performance with very little weight penalty.

Ultralight 10X fabric (weight: 26 gsm)

10X, PHD's First 10 Denier Fabric. 9,000 metres of the yarn used to weave 10X weighs just 10g, that's about the same as a £1 coin! For all its thinness 10X is amazingly downproof and with reasonable care will go on giving you good service for years.

1000 Fillpower Down

This rarest of all downs we reserve for the K Series. European goose down of unique quality. 1000 provides the highest warmth-for-weight performance possible from down. More on our down insulation.

Sizing

Standard Sizing

The PHD Sizing Chart below is based on measurements without clothing, exactly the way you would buy a shirt or a sweater. A 42" (107cm) chest means that your bare chest uninflated measures 42". Inside Arm is measured from armpit to wrist-bone.

Size Height Chest Waist Inside arm
XS 155-163cm
(5'1"–5'4")
86cm
(34")
71cm
(28")
46cm
(18")
S 164-170cm
(5'5"–5'7")
91cm
(36")
76cm
(30")
48cm
(19")
M 171-178cm
(5'7"–5'10")
99cm
(39")
84cm
(33")
51cm
(20")
L 179-186cm
(5'10"–6'1")
107cm
(42")
91cm
(36")
53cm
(21")
XL 187-193cm
(6'2"–6'4")
114cm
(45")
99cm
(39")
56cm
(22")

Custom Sizing

Once you've selected a Body Width you can choose Body Length and Arm Length up to two sizes bigger or smaller. For example, a jacket with a medium (M) Body Width can be XS, S, M, L, or XL in Body Length and XS, S, M, L, or XL in Arm Length. If you have any questions about your size, please contact us.

Body Width. Use the chart below to find your Body Width. Measure yourself without clothes, relaxed with an uninflated chest.

Body Width Chest circumference Waist circumference
XS 86cm (34") 71cm (28")
S 91cm (36") 76cm (30")
M 99cm (39") 84cm (33")
L 107cm (42") 91cm (36")
XL 114cm (45") 99cm (39")


Body Length -- can be two sizes up or down from Body Width. Use the chart below to find your Body Length size. Measure your height without shoes:

Body Length Size
Your height in cm Your height in inches
XXXS 139 - 144cm 4'5" - 4'8"
XXS 145 - 154cm 4'9" - 5'
XS 155 - 163cm 5'1" - 5'4"
S 164 - 170cm 5'5" - 5'7"
M 171 - 178cm 5'7" - 5'10"
L 179 - 186cm 5'10" - 6'1"
XL 187 - 193cm 6'2" - 6'4"
XXL 194 - 201cm 6'4" - 6'7"
XXXL 202 - 209cm 6'8" - 6'10"


Inside Arm -- can be two sizes up or down from Body Width. Inside Arm is measured from armpit to wrist-bone without clothes. When you measure your inside arm let your arm hang loosely by your side. Don't extend it horizontally.

Inside Arm cm Inches
XXXS 41cm 16"
XXS 43cm 17"
XS 46cm 18"
S 48cm 19"
M 51cm 20"
L 53cm 21"
XL 56cm 22"
XXL 58cm 23"
XXXL 61cm 24"

N.B. PHD clothing is unisex.

Notes:

  • Down Jackets are sized to fit over thermal underwear & fleece.
  • Shell Jackets are sized to fit over thermal underwear & fleece or light down clothing (e.g. Minimus Jacket): to cover thick down clothing, go up one size.
  • The arms of our outdoor jackets are designed to be long enough to keep your wrists warm when your arms are extended horizontally (when using trekking poles, for example) or when you are reaching above yourself (when climbing, for example). In this respect the arm lengths of our jackets differ from street/fashion jackets.

Reviews

Reviews relate to previous Delta Belay Jacket, not this brand-new version

"PHD ... make fantastic hooded down jackets that provide huge levels of protection (the PHD Delta for example)."
Andy Kirkpatrick.

"The Delta Belay jacket you made for me has a totally bulletproof feel about it that puts my old Patagonia DAS Parka to shame. The hood is superb and the sizing is perfect to go on over my normal winter climbing gear."
Chris W.

"I've been using your Delta belay jacket for a couple of years and really like it."
Jeff Ingman.

"This is a lovely piece. It's badass protection."
Petesy (a.k.a. Peter Macfarlane).

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