Sorry, this product has been archived and is no longer available for purchase.

Berwyn [Mens]

Pure lambswool jumper

100% sheep-powered chunky-knit jumper using pure lambswool: a naturally warm, breathable and odour-resistant plastic-free insulation alternative

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Sorry, this product has been archived and is no longer available for purchase.


Inspired by the North Wales climbing clothing of the 1950's and 1960's, Berwyn is a natural fibre chunky knitted jumper made from 100% pure lambswool.

Wool is nature’s great insulator with properties like natural moisture management and temperature regulation that make it an ideal midlayer for outdoor activities. If it can keep a whole herd of Herdwicks alive on the fells through winter, it’ll certainly keep ewe cosy (sorry) during crisp early morning bouldering sessions and claggy pre-Sunday dinner walks.

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A thick, open knit traps lots of toasty insulating air in still conditions or under a shell, but is still incredibly breathable. A fitted cut with a ribbed hem and cuffs also enables easy layering and the stretch of the knit allows you to move unimpeded.

Unlike that ripe old fleece you keep forgetting to wash, wool is naturally odour resistant. In fact, an airing-out in a stiff breeze is all you’ll need to do to look after your Berwyn most of the time.

Not forgetting that wool is 100% natural, biodegradable and renewable (sheep produce new fleece and sheep produce new sheep... usually in spring... they gambol... you know all this...) – what's not to like?

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Key Features

  • 100% natural, biodegradable and ethically sourced wool
  • Keeps you warm: a chunky knit and the natural structure of wool fibres trap still, insulating air
  • Very breathable as a midlayer thanks to wool’s natural moisture management and the open knit
  • Thermoregulatory properties of wool keep you warm in the cold and cool when you heat up
  • Wool is naturally odour-resistant, requiring very little washing
  • Designed for movement with fitted style and ribbed hems and cuffs

Vital stats


100% lambswool (510gsm knit) Synthetic leatherette tag on hem


400g (Men's Medium)

Origin: China

Care & Environmental Advice

Product Care Information

Spot clean to remove any dirty patches and, when necessary, hand wash only and dry flat. Do not bleach, do not iron and do not tumble dry.

Environmental considerations

The wool in this jumper is ethically sourced, biodegradable, renewable and naturally odour resistant so doesn’t need washing often: hooray environment!

Size Guide
Men's Midlayer
Chest (inches/cm) 37 / 94 40 / 102 43 / 109 46 / 117 49 / 124
Waist (inches/cm) 30 / 76 32 / 81 34 / 86 36 / 91 38 / 97
EU 46 48 50 52 54
USA 36 38 40 42 44
This size chart indicates the body measurements our garments are designed to fit. Measure yourself as described below, and use the size chart to find your size.
Chest: measure around your chest at the widest part. The tape measure should pass under your arms, and be level from front to back.
Waist: measure around your waist at the narrowest part.
Hips: standing with your feet together, measure around your hips at the widest part.

The Details

Berwyn in action