Icebreaker Size Chart After a long, cold winter's day outside, peel off your technical layers, mix up a hot drink and button up the Lodge Long Sleeve Flannel Shirt. Made from 100% merino wool flannel in a hefty winter weight, the Lodge Long Sleeve Flannel Shirt is as warm as a woodstove. A classic checkered plaid print, button front and two chest pockets provide reliable style and comfort. Features: - Winter weight woven for cold conditions - Button chest pockets - Button closure cuffs - Weight (Size Medium): 427 g / 15.06 oz - 100% Merino Wool