Microfiber & Polar Hat Junior. Stretchable and warm hat for kids featuring advanced sun protection against UV radiation. Microfiber and polar kids' hat designed for winter and cold weather. Warm and soft hat designed for low and medium intensity winter activities. Ideal for protection against the cold during outdoor activities like trail running, hiking, trekking, bouldering and climbing. Design: Patterned. Size: One Size. Designed for kids (4-12 years).