Sigma Socks

Lightweight socks filled with synthetic insulation for camping in cool and wet conditions.
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.
110g / 4oz
Sigma Primaloft Insulated Socks / Booties


  • Primaloft Gold® synthetic insulation (200gsm warmth)
  • Breathable & windproof MX outer and inner fabric
  • Lycra closure above the ankle
  • Elastic cinch at the ankle
  • Edge-stitched for maximum loft
  • Stuff sac supplied
  • Pack size 10 x 18cm*


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


Small and lightweight, these insulated socks, made with extremely warm 200gsm Primaloft Gold® synthetic filling, are the perfect choice for warming up your feet when camping in cold and wet conditions. Packing down into a tiny stuff sac, the Sigma socks make little difference to your load, but a big difference to the warmth of your feet.

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

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

Works well with
From £363.00 370g -5℃
A synthetic-insulated lightweight jacket. Primaloft Gold-fill to cope with cold, wet...
From £228.00 220g -5℃
Warm trousers filled with synthetic insulation for camping in cool and wet conditions....