Sigma Vest

A synthetic-insulated lightweight vest. Robust fabric and Primaloft Gold-fill to cope with damp and wet conditions. Now 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.
0°C / 32°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.
220g / 8oz
Price
£172.00
With optional water-resistant Ultrashell fabric

An exceptionally versatile piece of kit. The design and cut make it exceptionally light for the level of insulation it gives compared with other Primaloft garments I have used.
R.C.

Size
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Features

  • Primaloft Gold® synthetic insulation
  • Breathable & windproof MX outer and inner fabric
  • Edge-stitched for full loft
  • Full length lightweight front zip
  • Insulated under baffle with wrapover chin guard
  • 2 zipped hand warmer pockets at waist level
  • Droptail back
  • Lycra edging on hem and armholes
  • Stuff sac
  • Pack size: 10 x 18cm*
  • Options:
    • Wind and Water resistant Ultrashell outer fabric: adds approx 10grms (0.35oz) to weight. Burnt Orange, Blue or Charcoal (+£11)
    • Stud-on Primaloft-filled hood (+£32)

 

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

Description:

This synthetic-insulated vest is now also available in custom sizesSpecify Body Width and Body Length independently to order a made-to-measure Primaloft-filled vest. This tailor-made service can cope with sizes from XXXS to XXXL and is ideal if your chest/waist to height ratio differs from standard, ready-to-wear patterns. 


With a combination of Primaloft Gold® insulation, our lightweight MX fabric, light zips, and a simple design, this synthetic filled Vest is the right piece of kit when it's going to be cold and damp.

In our experience the 100grm/m Primaloft Gold® synthetic insulation absorbs water much more slowly than other synthetic waddings, a marked advantage in cold, wet conditions.

Optional Ultrashell Outer

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. Weight 40grm/m.

Please note: If you order a custom-sized version of this vest it will take longer (approximately 45 days) to be manufactured ready for dispatch. Custom-sized versions of this vest are not returnable and customer loyalty discount cannot be applied.

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.


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


"I have been using this for about a year in a full range of weather conditions, and it has proved to be an exceptionally versatile piece of kit. Whether as insulation for UK summer mountain conditions (as a much lighter alternative than a jacket or pull-on), or as backup or emergency use alongside a belay jacket in winter, or a sleeping bag booster, or (increasingly) just something thrown on for everyday use, its usefulness goes far beyond what might be expected of such an apparently simple vest. The design and cut make it exceptionally light for the level of insulation it gives compared with other Primaloft garments I have used. With the hood, it has been extremely welcome in some unexpectedly cold conditions, though its packed size and weight make in barely noticeable in a rucksack. One thing that really stands out is the level of 'loft' the design allows, which makes a real difference at the level of performance compared to other manufacturers' garments that on paper look similar. The workmanship and quality of the materials are flawless."
R.C., Leeds

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