These mittens are a simple, light solution for the weight conscious seeking to maximize heat retention, mitigate cold gusts, and resist light precipitation. Ideal on windy cool gray days when a bulkier option would be too warm, use the UL Wind Mittens in late spring thru early fall and pair them with a light thermal glove for a versatile system when tackling colder conditions. Material: 12-denier Ballistic Airlight nylon ripstop (Acrylic coating) Size medium. My hand measures 8 inches from wrist to the top of my middle finger. These gloves are about the perfect size. They do fit tight though.