Blog

Alpha Direct, PrimaLoft ACTIVE and Octa: A Guide to Active Insulation

Posted by Andy Neil on 3rd Nov 2026

Keeping warm while moving can be tricky. Too much insulation and you’ll sweat on the climb; too little and a cold wind can quickly chill you at the ridge. Polartec Alpha Direct, PrimaLoft ACTIVE, and Octa take a particularly effective approach: lightweight, open constructions that trap warm air while letting heat and moisture escape. Paired with the right outer layer, they offer exceptional …
read more

Knowledgebase Page - Choosing a Shell Jacket

24th Sep 2026

If you want a jacket to keep you dry when running, this will be a very different jacket to one suitable for backpacking or trekking. Waterproofs designed for running will be very lightweight so that they won't slow you down. It needs to pack very small so you can carry it when you don't need it, and the best examples will be highly breathable. Also, consider a smock to save weight. A backpacking j …
read more

Polartec Alpha explained

Posted by Mark Richardson on 26th May 2022

Alpha is one of a range of insulation from Polartec, we explain what it does and include our opinion of it.

Polartec Power Stretch Pro explained

Posted by Mark Richardson on 24th May 2022

Power Stretch Pro is one of a range of fabrics from Polartec, we explain what the fabric does and include our opinion of it.

Polartec Power Grid explained

Posted by Mark Richardson on 23rd May 2022

Power Grid is one of a range of insulating fabrics from Polartec, we explain what it does and include our opinion of it.

Polartec Alpha Direct explained

Posted by Mark Richardson on 19th May 2022

Alpha Direct is one of a range of insulation from Polartec, we explain what it does and include our opinion of it.

Polartec Wind Pro explained

Posted by Mark Richardson on 17th May 2022

Wind Pro is one of a range of insulating fabrics from Polartec, we explain what it does and include our opinion of it.

Polartec Thermal Pro High Loft explained

Posted by Mark Richardson on 16th May 2022

Thermal Pro High Loft is one of a range of insulating fabrics from Polartec, we explain what it does and include our opinion of it.

Montane Womens Allez Pull-on Review - Ultralight Outdoor Gear

5th May 2022

A baselayer is a baselayer isn’t it? Not so, I Love my Montane Allez Pull-on and did so the first time I put it on. What I like about it is Polartec fleecy grid fabric on the inside face is just so soft and comfy while still being highly breathable. I wore mine on a warm and sunny late September day hiking above Zermatt in Switzerland, it was 20 degrees but I didn’t overheat and felt …
read more

Polartec Fabrics explained

Posted by Mark Richardson on 22nd Mar 2022

Polartec are a legendary manufacturer of performance fabrics for the outdoors, we summarise their range featured in our products here - click through the links on this page to learn more about each on, including what we think.