The Cross Warm mittens block the wind right at the surface, and the Thinsulate insulation fiber traps the air warmed by your hands. Your fingers share their warmth with each otherthe difference compared to gloves is noticeable. For those interested in the technical details: the insulation material weight is 140g/m². - Outer fabric is windproof AdvancedSkin Shield - Well-fitting, long cuff easily slips inside the jacket sleeve - Synthetic leather on the palmdurable and provides a good grip