The Six Pack Fitness Expedition 500 Meal Management Backpack in Gray/Green is a large, durable backpack made of nylon with six pockets for organization. It is in fantastic condition. It features a zip closure, adjustable carrying strap, and hidden compartment for added convenience. The backpack is designed for unisex adults and is perfect for gym, training activities, with a fitness bodybuilding theme. Easy to care for, this multifunction compartment backpack with a zip fastener and food capable features is ideal for those looking to manage their meals and gear while on the go.