Slinky Down Waistcoat 'K Series'

The lightest down top in the world! A combination of our lightest fabric with our unique 1000 fillpower down for a whisper-light midlayer. Also available in custom sizes.

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.
5°C / 41°F
Weight
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.
60g / 2oz
Price
£216.00
Slinky Down Waistcoat 'K Series'
Size
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Features

  • PHD's unique 1000 fillpower European Goose Down
  • Outer & Inner fabric: Vertex (7 denier, 18g/m2)
  • Stitch-through construction for maximum weight saving
  • Elasticated hem and arm holes
  • YKK plancer studs down the front
  • Stuff sac – size 0.5 (8 x 13cm)*

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

Description:

At just 60g (2.1oz), the Slinky Waistcoat is the lightest down top we’ve ever designed. A tiny lightweight that delivers real mid-layer insulation.

Only available during June 2025.

Made in our whisper-light Vertex fabric to give total wind-block and filled with our unique 1000 fillpower down the Slinky provides the highest warmth-for-weight performance possible. Packed into a tiny stuff sac, the Slinky Waistcoat is perfect for anyone planning to pack superlight. Summer racers, ultra-light trekking, and those counting every gram. 

The Slinky Waistcoat will fit snugly under any of our down jackets, even the Wafer, but also delivers superb insulation as a midlayer under a wind-cheater such as our Windsmock.

  • Pack without noticing the weight (or the bulk).
  • A midlayer to boost warmth: light insulation under a wind-cheater or a light outer top.
  • Add performance to your sleeping bag.

The Slinky Waistcoat is a breathtaking, superlight top that gives real warmth around camp and can add warmth when you're using a sleeping bag or quilt. Incredibly, it weighs less than a short-sleeved base layer and packs down into a tiny stuff sac.

 

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 and body 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.


Part of the Summer Lightning Collection

Summer Lightning is a short-term opportunity to lay your hands on unique kit. This extraordinary gear is only available for such a short time because in summer we have a little breathing space to put some of our best ideas into practice, to turn possibilities into actual equipment. If you want us to make you one; order while you can! Only available during June!

Ultralight Vertex fabric (weight: 18 gsm)

Breathtakingly light at 18 gsm, Vertex is the ultimate in technical fabrics for extreme weight saving. This fabric is down-proof and superbly wind-proof and represents a high-point in the development of lightweight technical fabrics. The result of years of evolution and testing, this whisper-light fabric opens up new possibilities at the pinnacle of lightweight gear design

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.


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