M's PUFFER PANT RUN SOCKS It starts with the slimmest

It starts with the slimmest possible profile and then builds up reinforcements in key areas where strength is needed - like the Energy Backbone down each boot spine

Premium anti-pill micro-fleece lining and 3M™ Thinsulate™ insulation

One of our most-loved styles returns for an encore performance of Infiknit™ comfort and style

100% POLYESTER

Race technology and bootfitter-approved customizable features make up the Formula RS 105 W's design including an extended toe box for toe articulation

M's PUFFER PANT RUN SOCKS It starts with the slimmestInsulated baselayers? Yep. Thats a thing. The Puffer Pant is a fleece long underwear bottom thats got panels of warm down insulation on the upper half of the pants, where you could use a little extra coverage when riding cold chairlifts or touring on a frigid day. They also do double duty as loungewear in a backcountry hut or on a powder chasing road trip. Gridded fleece with strategically placed insulated panels where you need the most warmth Stretch