The XTM Buttermilk Kids mitt is suitable for ages 4-10 years and has a GoreTex waterproof and breathable membrane, and insulated with Thinsulate making it warm but not bulky. The wristband is Velcro adjustable and the palm is Rubbertec, with a Durable taslon outer. The Buttermilk is from XTM's premium gloves range.