Longjohns

Montane Dart XT Long Johns are premium thermal baselayer bottoms for high-exertion activities in cold weather. They're made from Montane's Apex Thermo Eco recycled polyester fabric and have excellent...

The Mountain Equipment Eclipse Pants offer core warmth, wick moisture, breathe well, and dry quickly, making them ideal for high-output activities like climbing and skiing. Mountain Equipment...

High-quality mountain runners’ legwear that protects from the harsh winter cold. Made from durable materials, they have a comfortable fit and various features that make them ideal for mountain...

The classic, go-anywhere all-around baselayer, made with 100% recycled content. The smooth, soft face makes for easy layering; hollow-core yarns and a diamond-grid back trap warm air, wick moisture...

Lightweight leggings that utilise the incredible properties of Merino wool to insulate and regulate your body.  Rab says:  Warm, breathable, form fitting leggings ideal as a baselayer on cold...

A simple but efficient pair of long johns that balance warmth, breathability and comfort for winter layering. Fjallraven says:  Light, soft and warm long johns made from 100% traceable merino wool...

Patagonia's Capilene Theramal Weight Bottoms are warm, breathable polyester baselayers with minimal bulk. Polartec Power Grid fabric with Polygiene permanent odor control. Fair Trade Certified sewn. ...

Technical warmth and precision fit for demanding alpine conditions. Mammut says:  The ideal base layer for next-to-skin comfort during intense winter climbing. Tested by athletes as part of our Eiger...

BG TOP PICK:  Light, durable, and naturally comfortable, the Montane Malli Leggings blend Merino performance with synthetic strength — a top choice for mountain layering and multi-day use. Montane...

Lightweight warmth and flexibility for cold-weather pursuits. Rab says:  Made with exceptionally warm, fast-drying Thermic™ Stretch Pro fabric, these lightweight fleece tights offer a boost of warmth...