Liner to Heli Ski Jr Mitt, 30561. INSULATION Fiberfill/polyester. LINING Bemberg/polyamide. FEATURES: Velcro attachment. MEASURE YOUR HAND: For the length: Measure the distance between the wrist and the tip of the middle finger. The circumference of your palm should be measured at its widest point. Recommended size is an indication. Hands are different and some models have a tighter fit than others. Hestra Heli Ski JR Liner Mitt