CONSTRUCTION: Active Mesh Teijin Octa 100% Polyester fabric. Ventilated mesh fabric with brushed backer that works to thermoregulate USE CASE: Ideal for camping, hiking and everyday casual wear, the AirMesh Long Sleeve Crew provides retains warmth without overheating FIT: Standard fit with stand color collar with center front half zip. Side seams are designed to eliminate chafing. Raglan sleeves provide increased mobility FEATURES: Low profile thumb holes and screen printed Mountain Hardwear logo at bottom left hem LIMITED LIFETIME WARRANTY: Limited Lifetime Warranty covers defects in materials and workmanship for the practical lifetime of Mountain Hardwear brand products manufactured by Mountain Hardwear