Alpha Belay Jacket (sale)

A Primaloft insulated belay jacket for unfriendly wild & damp conditions. Designed especially for tough climbing days on classic mixed mountain routes and technical steep water-ice. £142 less than our standard version.
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.
-10°C / 14°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.
660g / 23oz
Alpha Primaloft Belay Jacket

It's arguably the perfect choice for the wet and wild Scottish winter.
Trail Magazine.



  • £142 less than our standard version
  • Outer fabric: Water-resistant / Breathable Drishell Plus outer fabric* (with taped shoulder seams)
  • Inner Fabric: Breathable ripstop superlight M1
  • Primaloft Gold® synthetic insulation (133g/m weight in body and sleeves)
  • Front closure - 2 way YKK Aquaguard water-resistant zip with bottom locking stud
  • 3 insulated pockets:
    • 2 zipped waist level pockets
    • 1 zipped chest pocket
  • Integral hood with wired peak, sized for a modern climber's helmet:
    • Adjustable front cord with cord ends tethered inside the hood
    • Wired peak
    • Volume reducer on the back of the hood
  • Reflector tape on front and back for night location
  • Clip loop to secure jacket at change-overs
  • Double exit adjustable hem cord
  • The Primaloft filling is edge stitched only to allow maximum loft
  • Cuffs; simple Velcro closure, to go over or under gloves
  • Stuff sac
  • Pack size: 13 x 21cm**


*Please note: although the outer fabric is waterproof, only the shoulder stitch lines are taped. So, although the outer will shed a lot of rain and snow, in a heavy downpour water can penetrate the stitching. However, the Primaloft Gold® insulation retains much of its insulation if wet. As always in the mountains, if there is a possibility of prolonged rain, carry full specification waterproofs.

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



This version in this sale is made in Drishell Plus fabric and on offer at £142 less than our standard version.

Part of PHD’s trio of synthetic filled Belay Jackets (the Epsilon, Alpha and Zeta, with TOT* ratings of -5°C /-10°C /-20°C respectively), these technical insulating tops are perfectly adapted to wild, wet, unforgiving conditions: typical Scottish winter, essentially. It doesn’t end there though: demanding routes in demanding conditions – whether on steep water ice, big mountain faces or classic mixed test-pieces – are where these jackets belong, and those conditions will be familiar to climbers throughout Scandinavia, the Alps, the Arctic and Patagonia.

Equally at home when climbing or on the belay ledge, if you choose to swap one jacket between two of you as you change over at belays, you’ll find the cut is roomy enough to fit over your outer layers. If you’re keeping it for yourself though and climbing in it all day, the fit is nevertheless trim and efficient: ideal for wearing under your harness.

Freedom of movement is essential for a climber’s jacket, and so of course is protection from the elements. The climber-specific fit, waterproof fabric (with taped shoulder seams), grown on hood, full length water-resistant zip, extra body length, and pocket locations make for a solid, dependable jacket which allows you to just get on with the task at hand.

In our experience Primaloft Gold® absorbs water much more slowly than other waddings, a marked advantage in wet-cold conditions. Effectively, if you can retain warm air in the insulation rather than replacing it with cold water, the garment will stay much warmer.

Please note: this jacket is designed and sized to be worn over top / outer layers. It provides additional warmth on cold belays and, can be swapped between climbers at pitch change-overs. If you want a trimmer more athletic fit select the next size down.

Dispatch time: As with all PHD products, these are made to order and by hand. We estimate it will take us around 4 to 6 weeks to make and dispatch sale orders. During busy periods it may take a little longer.

*TOT: Typical Operating Temperature

Outdoor photos: Paul Horsman.

Water-resistant Drishell Plus outer fabric (weight: 80 gsm)

Drishell Plus is an even more heavily proofed version of our water-resistant Drishell fabric. Drishell Plus is a Ripstop Nylon fabric with a superb waterproof coating that achieves total windblock with good breathability and excellent water-resistance to protect the Down.

Lightweight M1 fabric (weight: 39 gsm)

Lightweight silky microfibre. This close-weave 20 denier fabric is fully downproof, but also light and flexible enough to allow the down full loft. A reliable performer that has been the basis for much of our lightweight gear for some time.

Primaloft Gold®

Primaloft Gold® is the ideal microfibre insulation. Ultrafine fibres produce an insulating core that is incredibly soft, lightweight and water resistant. In our experience it absorbs water much more slowly than other waddings, a marked advantage in wet-cold conditions.

The nearest of the synthetics to the feel of down, yet tougher than you would expect. Primaloft Gold® offers the best warmth/weight performance in the Primaloft range

"It's arguably the perfect choice for the wet and wild Scottish winter."
Trail Magazine.

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