Smooth, anti-pick, anti-pill fabric for a more comfortable, snag-free finish. Signature Moisture Transport System wicks sweat to keep you dry and light. Anti-microbial technology keeps your gear fresher, longer. Built-in UPF 30+ sun protection. Lightweight 4-way stretch construction improves mobility and maintains shape. durable rib knit collar. 95% Polyester, 5% Elastane.