40 Gram 3M's Thinsulate Insulation: It keeps hands warm while remaining slim and light enough for mobility and flexibility. Waterproof, Windproof and Breathability: The surface shell keeps snow and water outside, and the interior layers is moisture wicking when hands sweat. It is specially good for long time skiing, snowboarding, sledding, biking and etc. Zippered Pocket Design is easy to carry keys, cards or some cash and other accessories. Thumb Back is with soft lens wiper fabric. Soft PU, PVC palm and reinforced fingers ensures strong and flexiable hand grip. It is more durable use when doing exercise in winter. Buckle Wrist Strap is for comfortable and custom fit,the drawstring closure is adjustable to prevent snow and wind outside.