100% Polyester; UA Storm technology delivers an element-battling, highly water-repellent finish; Soft-lined laptop sleeve holds up to 15" sized laptop; Large vented main compartment with internal organization for carrying a laptop, tablet, valuables & more; Two exterior valuables pockets; Dual-direction extra deep-water bottle pocket; Welded hypalon modern molle webbing for additional attachment points; Works as both a backpack & duffle with removable duffle strap; Padded air mesh back panel & PU-coated body fabric; Gusseted laundry and shoe pocket placed at bottom;