The Black mittens use the same aerogel insulation as most of our other gear and keep your hands warm in the most extreme cold conditions. They have a removable top to expose your fingers in the traditional hunting style and a set of magnets to hold the back in place. Mitten Sizing Information S- 7.5 to 8 inches M- 8.5 to 9 inches L- 9.5 to 10 inches XL- 10.5 to 11 inches Our Black Beanies will keep your head warm and comfortable! The secret is an thin layer of perforated aerogel insulation which keeps that noggin nice and warm. Hat Sizing Information M – 21 7/8 ” – 22 1/4 ”