100% polyester; UA Storm technology delivers an element-battling, highly water-resistant finish; Tough, abrasion-resistant nylon bottom panel built for extended durability; UA LEV ergonomically molded back panel provides maximum support, comfort and durability; Tricot lined valuables pocket on front & pouch with buckle closure; Welded Hypalon modern mole webbing for additional attachment points; Large main compartment with open storage space; Second compartment pockets for organization ; Elastic webbing for storing chargers or cords