The Arc'teryx LEAF Cold WX Bottom SV weighs 295 grams and uses Polartec Power Stretch fleece for heavyweight thermal performance in extreme cold. I wear this during single-digit snowboarding days when lighter base layers fail. The gusseted crotch enhances durability while allowing unrestricted movement, and flatlock seams prevent

The Arc'teryx Rho LT Zip Neck weighs 185g and uses Torrent 190 fleece with Polygiene odor control for cool-weather base layering. This is one of Arc'teryx's most popular baselayers, and for good reason. The brushed fleece interior feels soft against skin, while the smooth

The Arc'teryx Rho AR Zip Neck uses Torrent 230 fleece for cold-weather base layering when the lighter Rho LT isn't warm enough. This is the heavier sibling in Arc'teryx's Rho lineup, built for freezing temperatures and lower-output activities where heat retention matters

The Arc'teryx Rho LT Bottom uses Torrent 190 fleece with Polygiene odor-control for cool-weather base-layering below the waist. These pair with the Rho LT Zip Neck for a complete base layer system in matching fabric and performance. The stretchy construction moves with your body during skiing, hiking, and

The Arc'teryx Phase SL Zip Neck weighs 110 grams and dries faster than any other baselayer I've used. Phasic SL fabric, 100% polyester, sits tight against skin and pulls sweat off your body before you notice it's there. The deep front zip and tall