Design Your Own Tech-Light Sleeping Bag

Technical lightweight mountaineers’ and explorers’ design for seriously cold conditions. The right choice for fast ascents or weight-critical expeditions.
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Design Your Own Tech-Light Sleeping Bag

It's quite amazing. Very light and very packable. The level of choice is unique and the quality superb.
Daniel Neilson, TGO Magazine.



  • Temperature Range: from -8°C to -68°C (depends on your choice of down-fill)
  • Price range: £789 to over £2640 (depending on options selected)
  • Weight range: from 579g (20oz) to 3007g (106oz) depending on options selected
  • In TGO Magazine's Winter Sleeping Bag test, this bag outperformed 9 other top brands, more...
  • Box-wall construction for maximum loft
  • Close-fitting mummy-style hood
  • Down-filled collar to cut out drafts
  • Side block baffles to keep down above and below the body separate
  • 5 Length options
  • 4 Width options
  • 3 Outer fabric choices
  • 3 Inner fabric choices
  • Multiple zip options
  • Choose down stuff pattern (e.g. more down at the bag's base if you get cold feet)
  • Choose water-resistant inner panels to protect bag from damp at feet or around the head
  • Choose to add an internal security pocket
  • and much more...


Best Buy Award, TGO Magazine, Winter Sleeping Bags Test, 2015.

The Tech-Light blends the advantages of the Lightweight and Hi-Tech designs into a sleeping bag style which offers high performance in extreme environments at a remarkably low weight. This is the style to choose for fast-moving ascents or any venture into severe cold where weight will be critical.

Straight wall baffles minimise the construction weight, while the mummy hood, side V channels, and double draft tubes behind the zip optimise insulation.

Cut slightly wider to make allowance for clothing to be worn inside. Standard size: chest circle approx 160cm; waist circle 150cm.

"Best Buy" and "Lightest in Test" - TGO Magazine Winter Sleeping Bags Test

Best Buy Award, TGO Magazine, Winter Sleeping Bags Test. Lightest in Test Award, TGO Magazine, Winter Sleeping Bags Test.

"It's quite amazing. Very light and very packable. The level of choice is unique and the quality superb"
—Daniel Neilson, TGO Magazine.

"Easy, quick, and fun to use ... very well-designed ... provides the opportunity for a customized bag that is exactly what you want."
—Chris Townsend in

"Fantastic ... easy and fun to use ... well-thought out ... the range is enormous ... of value to everyone but particularly those who find standard sleeping bags the wrong shape or size."
—TGO Magazine

"Just to say that we’ve been absolutely loving our DYO sleeping bags these past few months in New Zealand. Cannot fault them - absolutely wonderful and frankly I don't know why I would ever sleep in anything else ever again!"
—Vanessa Barnett

"I just wanted to let you know how pleased I am with my new [Design-your-own] sleeping bag. I used it on the LAMM and I heard lots of people say next morning that they had been cold - and I was snuggly warm. I also had a tiny rucksack compared with my partner - thanks in large part to my ultra light (and gorgeous) sleeping bag."
—Kate O'Donoghue

"The online option to design and order your own sleeping bag, with 17 different variables, is wonderful."
—Tim Jepson, The Sunday Telegraph

"Down-bag maker PHD ... will stitch a sleeper to match your idea of the perfect bag for your body and your wilderness sleeping plans."
—Outside Magazine

"I don't have to go to dozens of stores to find the perfect sleeping bag; I go to a PHD, where I can customize everything in a sleeping bag, down to the fill pattern and which side it zips open."
—Quinton Hamel, Credit Union Times

"[Yours] is the most awesome piece of 'Design your own sleeping bag' software that I've ever seen."

"Just been pointed to your website, looking for a decent sleeping bag for Aconcagua & Himalayas. Just wanted to say that i found the website in general and the design your own bag section in particular, to be fantastic. Have spent over an hour designing (& re-designing) a bag, and still trying to make my mind up, too much bloody choice ... ! Anyway, glad to see a British company making world class gear, keep up the good work."

"Early this year I ordered a "Design Your Own" sleeping bag. Before then, I had searched for a long time for a lightweight -30°C sleeping bag with a zipper on the right side. After almost giving up, I discovered your website. I was amazed by all the options available and the surprisingly affordable prices (considering the quality that was offered and that it was produced in the UK and not China as many things are these days).

When it arrived I was anxious to test it. Early March, I crossed the Finnmark steppes in Northern Norway sleeping in temperatures around -30°C and it worked perfectly. It was nice and warm, and the condensation we had in the tent some mornings beaded and could easily be wiped off. Later, I tried it on several small trips, including one trip outside #Kautokeino (also in Northern Norway) with warmer temperatures (only -14°C in the night). I worried that it would be too warm, but it kept the temperature at a comfortable level even when the morning came and temperatures were -6°C.

Overall, this is the best sleeping bag I've ever had and I would just like to thank PHD for a great product - warm, super light, and the amazing option of being able to design it oneself. The sleeping bag has not only impressed me, but also my colleagues on the trips"
—Christian Kongstad.

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