Grab and go – The versatile and simple sackpack is easy to pack, making it ideal for those times you need to grab your kit and run to the gym. Durable material – Even when you use the drawstring backpack every day, the resilient fabric stands up to daily wear and tear. Secure fastenings – Carry your kit around in comfort with the chest clip that keeps the daypack secure and in place. Spacious design – Store trainers, socks, towels, snacks, a water bottle, toiletries, and more, all in the sports backpack. Material and fit – Under Armour Unisex UA Ozsee Sackpack, drawstring backpack, packable backpack, material: 100% Polyester.