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PHD Wafer Down Jacket Review

Review of the PHD Wafer Down Jacket. An amazingly light and warm down jacket made in the UK.

Last year I consciously made an effort to reduce my pack weight while wild camping on Mountain Leader training and assessment courses. Just by trimming the weight of a few key items I was able to make my pack load much more manageable and comfortable while backpacking over the UK mountains.

I always like to carry a lightweight insulated jacket of some sort. They are very versatile and can worn in a variety of situations: as a cold weather wind proof outer or a mid layer. An insulated jacket can be popped on during lunch or snack beaks. They are especially useful when on wild camps around camp in the evenings and also worn in your sleeping bag to give yourself a cosy warmth boost (this also allows a slightly lighter sleeping bag to be carried).

This is where the PHD Wafer down jacket comes in. This has to be one of the lightest insulated jackets in the world. It weighs a mere 190g or 7oz. The two key features which make this jacket so light are the 1000 fillpower down insulation and the exceptionally light construction fabrics. The 1000 fillpower down is the highest quality down available and this level of down quality allows an excellent warmth to weight ratio.

The Brand

The clothing brand PHD is a rare beast; a British company that make all their clothing and sleeping bags in the UK. Based in a mill east of Manchester they make all their products by hand. The designs are extremely innovative and their down filled garments are used from the Marathon des Sables in the Sahara to the summit of Everest. Here is a blog post about my visit tor the factory –  https://www.beyondtheedge.co.uk/phd-the-worlds-lightest-down-clothing/

The PHD Wafer Down Jacket

I’ve used this jacket for a year now, mainly in the UK but also in the American deserts of Arizona and Utah. The level of warmth makes it ideal for UK use. PHD themselves rate this jacket at 0°C or 32°F which in use feels about right.

Throughout this winter I’ve been mostly wearing the Wafer as a mid layer; it works really well over a base layer and light fleece and under a soft shell or for extra warmth under a thin synthetic layer. This allows your warmth to get trapped in the down taking advantage of the exceptional quality. It works really well for me under a Patagonia DAS Light Hoody which had a slightly over sized fit. The design of the Wafer jacket is simple; a stitch through construction, two zipped hand warmer pockets and elasticated hem and cuffs. This stripped down design along with the highest quality down and lightweight fabrics are what enable the Wafer to be one of the lightest down jackets in the world.

PHD Wafer Jacket

PHD Wafer Jacket

Most of the PHD gear is made to order with a 3-4 week waiting time but the Wafer jacket is part of their ‘ready made‘ range of clothing available off-the-shelf. \

Does this jacket have any drawbacks? Yes a couple, but they are manageable. Being extremely lightweight the fabric is not durable – this is not an outer jacket for climbing or scrambling and you certainly wouldn’t want to bushwhack through any thorny vegetation.

The other drawback is that down clothing doesn’t like getting wet: it becomes clumpy, loses its insulating properties and is really difficult to dry. However you can mitigate this by keeping the jacket in waterproof bags or dry bags while it’s in your pack and avoiding wear in the rain.

It’s not quite a drawback, but price is always a consideration when buying outdoor clothing. Currently the Wafer Jacket retails at £486: certainly not cheap but you are paying for the highest quality materials and supporting a company that is dedicated to manufacturing in the UK. Plus it is not an anomaly: other brands of down jackets of equivalent quality carry a similar price tag.

Conclusion

Expensive, yes… but you’re getting the best in the world. Use for ultralight backpacking, wild camping, ultra races and as a super-lightweight mid layer. Beautifully minimalist; just exactly what you need and absolutely nothing more.

Alex

Beyond the Edge Ltd is based in the Peak District, easily reached by train from London and within easy travelling distance from Sheffield, Manchester, Leeds, Nottingham and other Northern towns and cities.We are one of the UKs most experienced providers of climbing, walking, scrambling, mountaineering and navigation training courses. Most of our courses are run in the Peak District National Park which has some of the finest rock climbing, bouldering, walking and hiking in the world. 

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Beth Edwards profile picture
Beth Edwards
21 October 2026
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What an exceptional day. James and Charlie were brilliant. We were a large family group and they tailored the whole day to meet our needs, with great knowledge and experience, bringing such fun along the way. Enjoyed by multi generations from my 7 year old daughter to her active grandparents who watched on. Thank you both, what a day.
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Gemma Scougal
5 October 2026
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Chris has a wealth of knowledge and experience which he shares in a fun, relaxed and easy to understand way. I would definately recommend his courses. I had a fantastic day out learning about not only the red deer and the dilemas a fungi identification but conservation issues and some great facts about trees.
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Joe Parkinson
4 October 2026
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Alex was great! He was very encouraging and felt much calmer as the day went on after being nervous at first. Highly recommend!
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zygasas16
21 September 2026
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Top team really! Completed my RCI training with Alex and Chris. Learned a ton. Completed my RCI assessment with Alex, learned even more. Then came back for outdoor first aid refresher with Chris and had an opportunity to learn from a real mountain rescuer who had a wealth of real life experience and knowledge. 10/10
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Simon Lawrence
20 September 2026
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I completed a two day Hill Skills course with Alex leading and Nigel assisting. There were seven of us with a range of experience and confidence. Alex and Nigel set a lovely tone with it being friendly, relaxed, interesting, and encouraging. We spent a couple of hours both mornings familiarising ourselves with the equipment and testing it out. Then went for a walk that utilised and challenged those skills. Everyone was really friendly and helpful throughout. If you don't know what taking a bearing is, an OS reference, how (or why) to use an emergency shelter, or pacing is, or know the difference between a path or a right of way on a map, then this course is for you. I just completed a two day Lowland Leader training course and used all of the skills from the Hill Skills on it!
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Ollie Russell
13 September 2026
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I recently attended a NNAS silver award. The course was well organised from pre-course contact right through the two days. Claire who instructed the course was friendly, informative, and made sure I maximised my learning and experience for the weekend. Alex also instructed the second day and was equally great. I'd have no hesitation in attending another course with Beyond the edge and recommending them to others.
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Simon King-Cline (theupsidebiz)
13 September 2026
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I did the two day climbing and rope skills course with Alex. It was excellent in every way. His immense experience and knowledge combined with a very patient approach and encouraging attitude delivered a course that was great fun, and full of first class learning. I look forward to doing the remainder of the trad course later this year. 2 months later I then did the two day learn to trad course with James. Again this course was excellent in every way. I look forward to doing more courses such as the multi pitch in Wales.
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George Noble
12 September 2026
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The learn to lead trad course exceeded my expectations. Plenty of practice after some short lessons, James was a brilliant instructor throughout who adapted the course to the goals and level of each student, gave excellent advice to us as individuals and the group, and has offered substantial after care as we consolidate the course material by leading climbs in our own time. Would recommend to anyone.
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Kirsty Malcolm
11 September 2026
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I have just completed the two day Hill Skills course and I can’t recommend it more highly. I’ve been hiking for years and have even done serious hikes like the three peaks, Dolomites and in Austria, but like many I’ve been relying on apps and my phone and knew it was really time to build a proper foundation for my hiking skills. I was blown away by how much I learned from our brilliant instructor Graham. From getting confident with map reading and plotting routes off the trails, to learning about mountain rescue and what to do if things go wrong, this course was packed with amazing info and hands on practical skills. I’ll now be looking to complete my Lowland Leader accreditation and will definitely be back to Beyond the Edge. Thanks again!
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Max McKie
7 September 2026
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Fantastic 2 days spent on the outdoor first aid course. Chris is a great instructor with a lot of experience. I would highly recommend doing this course and booking with Beyond the Edge.
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