Men's Winter waterproof wind proof ski snowmobile mittens with Finger Inserts HOW DO THESE WINTER MITTENS FIT? These ski mittens fit true to size for most men. These gloves come in 3 different sizes, Medium, Large, and X-Large. The Medium size has an interior palm circumference of 9.5", the Large size has an interior palm circumference size of 10", and the X-Large Size has an interior palm circumference of 10.5. This amount of room transforms this snow glove for men and for young adults whose hands still fit within the 5.25 w x 10.5 l area. THINSULATE TEMPERATURE RATING: These ski mittens come with 40 gram Thinsulate lining and are best for temperatures of 20 degrees Fahrenheit and up, making them the perfect weight for most regions in the United States with exception to those in extreme cold. Ski mittens for men or boys with 40 gram Thinsulate are thin enough to allow for great flexibility yet arent too hot  heavier weight Thinsulate is extremely warm and can lead to sweaty hands which isnt ideal in cold weather. ARE THESE WINTER MITTENS WATERPROOF? The quick answer is yes, but the more accurate answer is yes, these winter mittens are waterproof under NORMAL use conditions. Normal use conditions include playing in the snow, sledding, going to the store, all standard outdoor activities in the cold and snow. Feel good using your mittens outside and expect your hands to be warm and dry under these situations. WHAT OTHER FEATURES DO THESE MITTENS HAVE? These gloves come with an adjustable wrist strap and elastic band that allows you to expand the opening of the glove to make it easier to get them on and off. Rubber Tech grip can be found on the palm and finger tips allowing for a better grip when handling items. Dry wipe on the back of the thumb is ideal for wiping off glasses, goggles, or that runny nose. The exterior of the gloves features a hook/slot function to connect the two gloves for storage. HOW DO YOU WASH / CARE FOR THESE WATEPROOF MITTENS? While hand washing is ideal, its not always practical. These mittens can go in the wash machine on delicate and be partially dried on delicate. We recommend NOT drying them fully and allow them to partially air dry. The exterior shell, liner, and filling are 100% polyester, and the Thinsulate is 65% Olefin/35% Polyester, but there is a synthetic waterproof shield between the shell and liner that could be compromised by extreme heat.