Breathable, lightweight hiking shirt in stretch fabric, ideal for hot days on the trail. Made with moisture-wicking, air-permeable technical fabric for a cool feel. Adjustable collar offers sun protection, and chest pockets double as ventilation. Perfect for hiking and travel, packs into its own pocket. Features include recycled polyester fabric, maximum ventilation, and a buttoned collar for sun protection. Specifications: Trekking activity, men's, recycled material, breathable, moisture-wicking, ventilation, packs into self, stretch material. Material: 84% polyester, 16% elastane. Weight: 11.5 oz. / 325 g (size M), comfort fit, long sleeves, press buttons closure, first layer, two chest pockets. Care: machine wash cold, do not dry clean, do not bleach, do not tumble dry, iron low, wash with similar colors, no fabric softener.