Deep Winter Base Layer Size:L ergonomic snood collar adds extra the Aero Socks are ergonomic snood collar adds extra protection from cold winds and features a discreet ponytail hole for all day comfort and practicality on the bike Our new Mens Pro Indoor Waist Short helps you manage your body temperature so you can focus on putting the effort in without being restricted the base layer optimises performance efficiency by delivering thermal protection and breathability while keeping weight to a minimum The fabric uses a patented geometric grid construction which traps warm air to boost warmth while creating open air channels for effective moisture evaporation and improved breathability