Youth Arm Sleeves Powered By Coolcore® - Moisture-Wicking is designed for youth athletes seeking reliable performance for team, training, and everyday use. Dry-Excel™ 84% polyester/16% elastane Coolcore® fabric. Key features include 4-way stretch properties allow for increased mobility; Garment protects against the sun with 50+ UPF; Wicks moisture; Ultra tight fit; Flatlock stitching provides comfort and helps prevent chafing; (sold as pair).