Yukon Down Jacket

The Yukon's box-wall construction pushes its capabilities beyond other lightweight mountain down jackets.
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.
-15°C / 5°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.
440g / 16oz
Yukon Down Jacket

Many thanks for the jacket that you supplied me for the Yukon Arctic Ultra. [It] performed perfectly in temperatures down to -35C.
Dr Stuart Gillet (wearing a prototype Yukon jacket).



  • Rare 950 fillpower European Goose down
  • Wind & water resistant Ultrashell outer
  • Superlight MX inner fabric
  • Box-wall construction for maximum loft
  • Front zip with internal draft baffle
  • 3 zipped, insulated pockets:
    • 2 waist level handwarmer through pockets
    • 1 Insulated chest pocket
  • Reflect zip pullers 
  • Stud-on down hood with stretch lycra edging
  • Stretch hem cord
  • Fleece-lined collar
  • Stuff sac
  • Superlight MX inner
  • Pack size: 13 x 21cm*


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


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, choose your body width, and then the body/arm lengths, shorter or longer, 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.

This lightweight down jacket was designed for the Yukon Ultra Race where competitors may be facing temperatures down to -30°C (-22°F)*, but weight and space are at a premium. Now filled with our exceptional 950 down the Yukon Jacket is lighter than ever, but just as warm.

The remarkable weight and pack-down size of the Yukon make it ideal for lightweight mountaineering, high level trekking, cold races and long-distance hiking.

Weighing just 440g / 15.5oz complete with hood, it combines a water-resistant Ultrashell fabric outer with a lightweight MX fabric inner. Its box wall construction and 950 fillpower down boost its performance well beyond the rest of our ultralight clothing. 

The handwarmer pockets are zipped to keep out blowing snow, the fleece lined collar seals out the cold, and there is a stretch drawcord in the hem. The insulated chest pocket keeps a GPS (or other battery-operated kit) both warm and easily available. The reflect zip pulls are a safety feature, improving night-time location. 

This is not designed as a high mountain jacket like the Xero. But when the kit has to be ultralight and stitch-through jackets are just not warm enough, the Yukon can be the ideal choice.

*Note Temperature rating. Race competitors balance comfort against weight by a different scale to most other people. The Typical Operating Temperature (TOT) is the NORMAL rating for this jacket, while -30°C is the racers' rating.


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.

Superlight MX fabric (weight: 32 gsm)

A mini-ripstop nylon with excellent tear strength, MX is the pick of the superfine 15 denier downproof materials. We have tested lighter fabrics, but most have had significant drawbacks, while our confidence in MX is based on several years of extensive use in both our ultralight and our high mountain gear.

950 fillpower down

A newcomer to our range. European goose of rare quality. A high value alternative at the top levels of performance. More on our down insulation.

"Many thanks for the jacket that you supplied me for the Yukon Arctic Ultra. [It] performed perfectly in temperatures down to -35C. The light weight and small size was also a huge help and helped me gain second place in the race. I ... am now the second fastest person over the course and the fastest European."
Dr Stuart Gillet (wearing a prototype Yukon jacket).

"Without PHD kit I would have been toast."
Jacob Hastrup 2nd place in Yukon Arctic Ultra 100 mile race.

"Thanks again for getting the Yukon jacket too me in time for my expedition to Peru, as you would expect it performed flawlessly - it came in handy when we had to make an unplanned bivi at 6000m."
Lloyd Betsworth.

"I used a Yukon down jacket with Gore-tex outer on the expedition. It packs down small (half the size of my previous jacket), it's great for early starts and when the snow starts falling."
Dominic Southgate - Imperial College Reru Valley Expedition (Zanskar Himalaya, India).

"I was leading really thrutching pitches in the dark late at night and was sure I would have ripped it to shreds, but not a scratch."
Jon Griffith on his one day ascent of the Bonatti Vaucher on the Jorasses north face using a PHD Yukon Down Jacket in Drishell fabric.

"For more serious winter outings I use PHD's Yukon Down Jackets. PHD make the best lightweight kit on the market. I just wouldn't go Munro bagging in winter without mine. It's fab."
Phil Newby.

"Ben was impressed with the Yukon Jacket I bought for him. In fact, we ended up fighting over it on more than one occasion! Again, simplicity of design, total warmth, amazing lightness and quality of manufacture was what made it stand out from the rest."
James Garrett.

"Thank you for the Yukon jacket! It fits super, is warm and nicely made."
Mark van Onna.

"Just wanted to thank you for the prompt delivery of my Yukon down jacket. It is fantastic and I have worn it constantly since it arrived."
Lise Cooper.