Under Armour Undeniable Drawstring Backpack ul)100% Polyester. UA Storm technology delivers an element-battling, highly water-repellent finish. Fluorine-free water repellent treatment. Fleece-lined front valuables pocket. Full-length, front insulated zippered pocket doubles as a water bottle sleeve or valuables pocket. Adjustable cording straps can easily be tied for a custom length & fit. Molle webbing on front panel for additional attachment points. Tough, TPU-coated bottom panel extends up the front for added durability. Custom UA sternum clip.