Features:- Rapid Wicking, Lightweight Merino-Blend Knit Main Body Fabric- Super-Stretch Woven Fabric On Sleeves For Extra Durability - Critically Positioned Mesh Panels For Ventilation - Two Zipped Rear Side Security Pockets - Articulated Sleeves For Bike Ready FitSpecifications:- Wool 40% Polyester 40%, Nylon 15%, Polyester (Recycled) 3% Elastane 2%