3M Recycled Thinsulate EC100 lining is made with 78% post consumer recycled materials, full-grain cowhide stitched with Kevlar® thread, welted seams and pulse protector, extra wide thumb strap, 3-finger back with winged thumb, snug-fitting shirred elastic wrist, 5 1/" reflective gauntlet cuff, leather gore with binding trim. 3777 unlined, size M–XL. Size Mâ€