- Size: One size - HIKENTURE L046-C3 winter hat in a pack of 2 units, designed for cycling, skiing, running, and outdoor activities - Made of high-quality fleece lining with a soft interior, keeps head and ears warm on cold days - Durable outer material, windproof and waterproof, ideal for adverse weather conditions - Ergonomic design with extended ear protection, prevents wind and cold from entering - Premium stretch fabric offers freedom of movement and a comfortable fit under the helmet - Breathable, prevents excessive sweating and keeps you fresh - Antibacterial treatment and high abrasion resistance for greater durability - Reflective logo enhances visibility and safety during nighttime activities - Easy to fold, lightweight, and compact to carry in any pocket or bag - Compatible as an inner cap for bicycle, ski, or climbing helmets, suitable for men and women (size 52-60 cm)