William Ellery Woolly is an ultralight mid layer, made of a breathable mesh fleece. The small hairs on the Woolly Bear Moth, and other insects, help to keep their body warm, and muscles limber. This Woolly helps to keep you warm, and your muscles limber for outdoor activities. The highly breathable mesh fleece allows perspiration to evaporate, providing optimal temperature regulation while active. In this version, patches on the forearms help protect from abrasion while rock climbing. These patches mimic the iridescent carapace of the June Bug and other beetles. This dynamic disruptive camouflage helps insects hide from predators despite its vibrance. One Size: US Mens Large. 42" Chest Model is 6'2 4028 Alpha Direct 68gsm Polyester Made in NYC, USA.