Hand warmers are a type of clothing accessory that are designed to keep hands and fingers warm in cold weather. GLOVES, mittens, and muff are all types of hand warmers. GLOVES are a type of hand warmer that cover the entire hand and have separate sections for each finger. Mittens are similar to GLOVES but have only one section for all the fingers. MUFFS are a type of hand warmer that covers the entire hand and is usually made of fur or other soft material. All three types of hand warmers are popular in cold climates and can be found in many stores.