Designed for extended trips while wearing a pack, the Iridine Zip Neck combines technical performance with durable construction and hardwearing materials. SkythaTM, an abrasion resistant polyester fabric, is used to withstand the abrasion encountered while wearing a pack and thrashing through the backcountry. With a weight appropriate for cooler temperatures, SkythaTM effectively wicks moisture, dries quickly, delivers UPF 50 sun protection, and employs a finish to minimize odor retention. For added comfort, softer HeliusTM polyester lines the collar. Features: Breathable Durable Quick drying Minimal odour retention Flatlocked seams lie flat for added comfort Gusseted underarms Soft, smooth lined collar Zip neck 14 front zip to aid in temperature regulation Auto locking zippers UPF Rating 50 Relaxed Fit Weight: 230 g 8.1 oz Activity: Hiking Trekking Materials: HeliusTM 100% polyester 112 gm . A lightweight, breathable, stretchy, plain knit textile with a moisture wicking finish to promote evaporation. SkythaTM 100% polyester, 172gm . A burly, mid weight, technical knit fabric with a subtly textured outer face and excellent moisture management properties. HeiQ Pure finish helps minimize odours. UPF 50 rated for sun protection.