Pink Thinsulate 3M children's ski mittens.

Insulation: They are insulated with 3M Thinsulate for warmth without excessive bulk. Weather Protection: The outer shell is often a durable, water-repellent nylon or polyester fabric with a fully waterproof insert to seal out snow and moisture.  Grip: The palm area often has a reinforced, anti-slip patch for better grip on objects like ski poles or sleds.  Fit and Security: They feature an elasticized wrist and a cuff (some styles are extended or ribbed knit) to help prevent snow from getting inside. Some designs, like those visually similar in search results, use hook-and-loop closures for an easy, secure fit.