Ready Made Wafer Down Jacket: 'K Series'

One of the lightest insulated jackets. A combination of an exceptionally lightweight fabric with PHD's unique 1000 fillpower down. A 'K Series' product: warmth to weight at the limit of possibilities.
Typical Operating Temperature
Guideline minimum temperature. Sleeping Bag TOT: you should get a night’s sleep, under normal circumstances. Clothing TOT: you should feel warm enough, assuming low/moderate activity. Sleep System TOT: relates to full system. For more details, see our Technical Briefing.
0°C / 32°F
For clothing, weight is for size: M. For sleeping bags, weight changes with selected length/width. N.B. there may be some variation in the weights of finished products.
190g / 7oz
Wafer Down Jacket

Amazingly light…packs down into a tiny ball. It's very comfortable to wear. I took the Wafer on the Scottish Watershed and loved it on chilly nights.
TGO Magazine's Gear Editor, Chris Townsend.



  • A PHD K Series product: Ultimate warmth / weight performance
  • PHD's Unique 1000 fillpower down
  • Outer & Inner fabric: exceptionally lightweight 10X
  • Stitch-through construction for lightness
  • Pockets: 2 zipped hand-warmer pockets.
  • Full length lightweight front zip backed by under-baffle
  • Ships within 5 working days
  • Lycra edging on hem and cuffs
  • Stuff sac – size 0 (10 x 18cm)*
  • Optional stud on hood with Lycra edging

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


Wafers are the new ultralight down clothing from PHD. Real outdoor gear which will add a raft of choices to your gear selection. Jacket, Vest, Trousers, and Socks.

A super-light jacket that offers much more in camp or bivvy than a fleece. It's lighter, warmer and windproof, as well as taking up one third as much space in your pack. (You could squash twenty Wafer jackets into your 20 litre day-sac: try that with twenty fleeces!)

This is the ideal warmer for spring or autumn camping, when that cold little evening wind makes the sunny afternoon a distant memory. And if the night's a bit colder than you expected, keep the Wafer jacket on inside your bag: a definite booster, particularly if you've got the Wafer trousers on too.

  • Ideal companion in a cool camp, bothy, or hut.
  • Pack without noticing the weight (or the bulk).
  • Midlayer to boost warmth: warmer than a fleece weighing more than twice as much, and windproof too.
  • Add performance to your sleeping bag.

Wafer Down Jacket Compared:

  Weight (gm) Packed Bulk (
Wafer Jacket 190 880
Wool Sweater (av) 400 2400
Fleece (mid/light) 500 2600
Fleece (thick) 600 3600

Note: Fabrics as thin as 10X do not stand up well to direct abrasion, so we do not recommend our Wafer gear as actual climbing outerwear. But for all its thinness 10X is amazingly downproof and windproof and with reasonable care will go on giving you good service for years.

This jacket is part of PHD's 'Ready Made' range. In stock and ready to ship within 5 working days.

Also available in Custom Sizes. Specify Body Width, Body Length, & Arm Length independently.



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.

"The lightest jacket tested by far, and also one of the warmest. There's nothing at anything like this weight that's as warm".
TGO Magazine's Review of Insulated Jackets. Read full review.

"Amazingly light…packs down into a tiny ball. It's very comfortable to wear. I took the Wafer on the Scottish Watershed and loved it on chilly nights."
TGO Magazine's Gear Editor, Chris Townsend. Read Chris' full review.

"Made in Britain, with all components coming from within Europe and stuffed with traceable down. All good stuff. Unfeasibly warm for something so light. Impressive manufacturing ethics. Score: 10/10"
Trail Running Magazine feature on 'Best Ethical Kit'.

"Seriously impressive warmth, premium-quality 1000FP down and ultra-light weight. If you want to stay warm, this is hard to beat."
Walk Magazine (Official Magazine of The Ramblers), 5/5 'Best in Test'.

"PHD's super-lightweight Wafer Down Jacket is a third less bulky than a fleece, offering superior standby warmth without taking up the space."
Wanderlust Magazine.

"Performed brilliantly. The hood was a great fit and tight enough to the face to keep off wind. Absolutely incredible warmth / weight ratio, could not be more impressed. Minimal packed bulk meant it could be kept in a rucksack pocket for easy access when temperatures dropped. I honestly cannot suggest improvement for this product."
Nikolas Bjelic on the Everest Base Camp Trail, Nepal.

"Offers perfect temperature control in almost every type of situation (between -5°C and +20°C)"
Alex F-B.

"Absolutely love the warmth and weight! Amazing engineering!"
Peter Reiter.

"It's brilliant!"
Ian Gauntlett.

"There are cheaper down jackets, but none made in the UK and none that'll fit into your one litre cooking pot when not in use."
Singletrack Magazine, 'Recommended'.

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