Xero Down Suit: K Series

'K Series' version of this high-altitude expedition suit. Light enough for the ascent, warm enough for when the mercury freezes. Warmth to weight at the limit of possibilities.

Typical Operating Temperature

-40°C / -40°F

Weight

1535g / 54oz

Price

£1,991.00

Rob Lucas, Everest summit, Xero 'K Series' Suit. (Photo: Kenton Cool)

On Everest summit with Olga Kotova - first woman from a Baltic State to summit Everest.

Rob Lucas, Everest summit, Xero 'K Series' Suit (with Kenton Cool and Dorje Gyalzen Sherpa)

Rob Lucas, Everest summit, Xero 'K Series' Suit (with Dorje Gyalzen Sherpa). Photo: Kenton Cool.

Rob Lucas, Everest, Xero 'K Series' Suit (with Dorje Gyalzen Sherpa). Photo: Kenton Cool.

with Chase Hinckley in Pakistan (fur ruff available as special request)

Fantastic ... felt toasty at -25C even when the wind picked up. It was a pleasure to live in them day and night.
Olga Kotova - using Xero down suit on Everest.

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Size

What’s my size?

Sizing

Standard Sizing

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

Size	Height	Chest	Waist	Inside arm	Inside leg
XS	155-163cm (5'1"–5'4")	86cm (34")	71cm (28")	46cm (18")	69cm (27")
S	164-170cm (5'5"–5'7")	91cm (36")	76cm (30")	48cm (19")	72cm (28.5")
M	171-178cm (5'7"–5'10")	99cm (39")	84cm (33")	51cm (20")	76cm (30")
L	179-186cm (5'10"–6'1")	107cm (42")	91cm (36")	53cm (21")	80cm (31.5")
XL	187-193cm (6'2"–6'4")	114cm (45")	99cm (39")	56cm (22")	84cm (33")

Custom Sizing

Once you've selected a Body Width you can choose Body Length, Arm Length, and Inside Leg up to two sizes bigger or smaller. For example, a suit with a medium (M) Body Width can be XS, S, M, L, or XL in Body Length; XS, S, M, L, or XL in Arm Length; and XS, S, M, L, or XL in Inside Leg. 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"

Inside Leg. Use the chart below to find your Inside Leg size. Measure yourself without clothes from crotch to ankle bone.

Inside Leg size	Inside Leg length
XXXS	61cm (24")
XXS	65cm (25.5")
XS	69cm (27")
S	72cm (28.5")
M	76cm (30")
L	80cm (31.5")
XL	84cm (33")
XXL	88cm (34.5")
XXXL	91cm (36")

N.B. PHD clothing is unisex.

Notes:

Down suits are sized to fit over thermal underwear and fleece.
Shell Suits: D-type suits will fit over down clothing of the same named size: F-type suits will only fit over thermals and fleece.
The arms of our suit 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 suits differ from street/fashion jackets.

Standard Sizing Custom Sizing Set body width, body length & arm length

Body Width

Body Length

Inside Leg

Arm Length

Size

Hood Attachment

Pit Zips

Toilet Access

Thigh-length side zips

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Features

PHD 'K Series' Product: Ultimate warmth / weight performance
Unique 1000 fillpower European Goose down
Water-resistant Ultrashell outer. An excellent balance of weight, water-resistance and breathability
Superlight 10X inner. Down-proof, wind proof and super soft
Box-wall construction for maximum loft
Differential Cut allowing full down loft
Tough HS2 fabric reinforcement at knees/bum & sleeve/shoulder
Front closure: 2 way zip covered by double baffle and Velcro
Short side zips (ankle to knee)
6 pockets:
- 2 cargo pockets
- 2 handwarmer pockets
- 2 inner water-bottle pockets with elasticated entry
Hood:
- large size with rear volume reducer
- elastic face cord with cord ends channels
- sewn on with adjustable front velcro closure
Arms and Knees articulated
Rainbow seat zip for toilet access
Elasticated waist and elasticated inner back for snug fit
Warm knitted cuffs
Internal braces - adjustable for varied clothing - removable
Reflector tape on pockets and back of hood for night searches
Beard flap
Mitt attachments at chest
Stuff sac
Pack size: 25 x 44cm*
Options:
- Detachable hood (zip-on/sewn-on)
- Under and Up zip as alternative for toilet access
- Pit zips (+£50)
- Thigh-length side zips (+£50)

* Please note: we make our stuff sacs big enough to allow fairly easy stuffing rather than reducing clothing 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...

An even lighter version of our Xero Down Suit. The ideal lightweight suit for today's fast ascents. It has seen many summits on Everest and the other 8000m giants. The Xero suit has full expedition specifications, with box-wall construction, expedition-style pockets inside and out, a voluminous hood and many other features. Designed to provide incredible weather protection on rapid high-altitude ascents or lightweight polar expeditions.

Also available in custom sizes. We make clothing to order, so if you’re not a standard size we can make it to fit. To order a non-standard custom size, select the Custom Sizing tab and choose the body width, body length, inside leg and arm length sizes that work for you. A custom size takes us a little longer (typically two weeks longer) to make and, because it’s personalized, it’s non-returnable and our customer loyalty scheme can’t be applied.

Toilet access on suits

Under & Up zip: The central front zip on the suit runs from the collar, down the front of the body, past the groin and then under and up to waist level at the back. A two-way zip allows access at any place.
Rainbow Seat zip: A rainbow / semicircle zip is sewn in across the backside. A two-way zip allows access and creates a drop down flap.

More on toilet access.

Ultrashell (weight: 40 gsm)

One of 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.

Waterproof HS2 outer fabric (weight: 88 gsm)

HS2 is a 2-layer laminate, a high-spec option for the outer layer of our insulated gear. This ripstop fabric strikes an excellent balance between lightness and durability. It is light enough for our Belay tops and tough enough for expedition use in our Omega clothing, while the Kappa clothing makes full use of both its qualities. HS2 is completely waterproof (when the seams are taped) and offers excellent breathability. (Weight: 88gsm).

"Fantastic ... felt toasty at -25C even when the wind picked up. It was a pleasure to live in them day and night."
— Olga Kotova - using Xero down suit on Everest. Olga was the first woman from a Baltic State to summit Everest.

"Wow, just wow. This is way better than anything Batman or Superman puts on. Truly impressed with the engineered finished product".
— Chase Hinckley.

"I ordered a Xero down suit ... off you guys middle of last year. I used [it] on Cho Oyu and [it] worked fantastically ... I did put the gear through a thorough test and am totally happy with the way [it] performed."
— Ben Kane, Guide

"Just a quick note to let you know that ALL 5 members of our team reached the Summit of Cho Oyo (8201m). I wore my Xero Down suit with 800 fill on the summit day and [it was] fantastic, the temp was -25C on the summit with a brisk 20-25 knot westerly wind, and I remained cosy warm for the 13 hours it took to get from camp 2 (7200m) to the summit and back down to camp 2. Thanks for the great gear."
— 'Lanx', UK Reserve Forces Seven Summits team.

"One of the most practical one-piece 8,000-metre down suits available. With six pockets and internal braces reinforced in key wear areas ... Designed by the man who produced the legendary Annapurna duvet jacket, the wind and snowproof Xero sports the same box wall construction found in top flight sleeping bags. Fitted with articulated knees and arms for ease of movement."
— Geographical Magazine.

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