Custom sized Wafer Down Vest: 'K Series'

Custom sized version of one of our lightest insulated vests. Specify Body Width and Body Length independently
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.
130g / 5oz
Custom sized Wafer Down Vest: 'K Series'

I am very, very, pleased with this purchase. It's always going to find a place in my pack for cool weather walking and backpacking"
Andy Howell



  • A PHD 'K Series' Product: Ultimate warmth / weight performance
  • PHD's unique 1000 fillpower Down
  • Outer & Inner fabric: exceptionally lightweight 10X
  • Stitch-through for lightness
  • Pockets: 2 zipped hand-warmer pockets
  • Full length front zip backed by under-baffle
  • Drop-tail back
  • Lycra edging on hem and armholes
  • Stuff sac – size 0.5 (8 x 13cm)*
  • 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 vest to the tightest minimum.


Custom sized. Choose the body width and body length that work for you. This custom sized item 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. This vest is also available in standard sizes (with a 5 day dispatch time).

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

One of the smallest, lightest packages of warmth we offer. Full zip front with two zipped handwarmers, all at 130gm inside our half-size stuff sac. The Wafer vest will fit snugly under any of our down jackets, even the Minimus or the Yukon.

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 Vest 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.

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.



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.

"I've used it a hell of a lot, both on the hills and in just about every other scenario I can think about. I find this a truly superb piece of kit.

There are two good hand warming pockets that have a generous capacity.

The vest is lovely and warm when zipped up. PHD rate this as useful down to zero but I think you'd be happy wearing this, perhaps, down to -5°C.

One of the main advantages of the Wafer Vest is that it is thin. This easily will slip under your shell jacket so that you can wear it while walking. I bought this jacket for extra warmth while moving not for extra warmth in camp and I think works very well for what I wanted it to do.

Wearing this vest under my jacket protects the down and adds little extra bulk. Although you want to keep down away from water down does wick steam and water vapour well. When working hard on the hill the vest is always very comfortable.

When the temperature begins to rise a simple opening of the front zip will loose a lot of heat. When completely un-zipped the jacket is so thin and light that you almost don’t realise you are wearing it.

The outer fabric of the vest is also very light but it doesn't seem too fragile and has coped well so far struggling through the usual woodland but remember this vest is designed to be worn under other protective layers. I am very, very, pleased with this purchase. At 190 grams it is always going to find a place in my pack for cool weather walking and backpacking."

Andy Howell.