Acclimate base layer fleece is a performance warm wear garment. The micro-denier construction provides added wind and water resistance. Fabric brushed on both sides for additional warmth. Excellent base layer in a base layer warming system or can be worn as an outer garments. Zipneck allows for venting for better warmth control. Moisture management system keeps you dry. Relaxed fit. Flatlock stitching ensures comfortable fit. Reusable packaging. 100% polyester. Made in Canada.