Convertible mitten gloves are mede of 50% Wool & 50% Acrylic outer shell, fleece interior, 100% thermal insulation, leather palm. The convertible fingerless glove is very convenient to get your fingers free to do something or put flap cover over to keep warm with a piece of velcro on the back. There is a piece of wearable hogskin on the palm and thumb, it is nonslip when you hold your pen, phone, bottle or other things.