Hestra Women's Luomi CZone Mitts. Outer Material: HESTRA APPAS windproof, waterproof and breathable polyester fabric. Impregnated Hair sheep leather in palm. Insert: CZone. Insulation: Primaloft Gold. Lining: Black brushed polyester. Features: Leather strap with press button Neoprene cuff on the inside of wrist Attachment for handcuffs 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.