Longjohns

A minimalist design for cold-weather active insulation. It provides warmth while being highly breathable and focused on wicking moisture and regulating body temperature during exercise. OMM says:  Superlight full base or midlayer using Primaloft…

These comfortable winter long johns are brilliant for a winter base layer or as part of your sleep system. Icebreaker says:  The benchmark against which all others are judged, the 200 Oasis Legless are icebreaker's ultra-comfortable base layer.…

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 insulation, moisture management, and odor resistan…

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 says These fitted lightweight fleece pants are perfect for…

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 and dry fast. HeiQ Fresh durable odor control keeps.…

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. Patagonia says Soft, stretchy, breathable and...

The Capilene Air range are seriously advanced baselayers. The impressive range of warmth and comfort insulates when wet, dries quickly, and resists odors for day after day use. It is light and soft on the skin and has comfortable natural stretch...

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 and comfort as a baselayer in cold...

Light, flexible, and breathable, the Fury Lite Pants are a dependable choice for outdoor enthusiasts seeking versatile leg protection in cooler conditions. Montane says:  A lightweight mid layer fleece pant built for cold days when additional co…

Utilising a unique dual fabric layering system, these cold-weather Long Johns are an excellent baselayer that can also be incorporated into your sleep system. Helly Hansen says:  Performance 2-in-1 base layer pants with a warm and breathable 10…