The Black Diamond WindWeight Mitt is a warm and windproof convertible mitten with a soft fleece exterior and interior. The mitt flips back and clips with a magnetic closure to give you a 3/4-length fingerless glove. Made with PolartecA(R) WindblocA(R) fabric, and a suede palm patch. Specs Weight Per Pair : [Size M] 86 g (3.0 oz) Temperature Range : -4/4 AdegC (25/40 AdegF)