Kids love these joggers for the softness and breathability. Their grown-ups love ¡®em for the UPF 50+ sun protection they provide. Win win, much! Fabric: 100% recycled polyester that wicks sweats, dries fast, and has UPF 50+ protection for all-day play. Feel: Super smooth and ultra breathable. Learn more. Fit: Functional drawstring for adjustable fit, plus side pockets for Legos and lunch money.