Adjustable Padded Strap - Zip Close - Zippered Hidden Back Pocket - Zippered Hidden Back Pocket - Black Cotton Canvas Padded Back - Lined 10" L x 4" W x 18" H We finally designed a recycled backpack that we 100% love! Crafted from recycled cement bags, they are perfect for school, work, and every day. The adjustable padded strap and back ensure your comfort and these cuties are also so durable. Adjustable Padded Strap Zip Close Zippered Hidden Back Pocket Black Cotton Canvas Padded Back Lined 10" L x 4" W x 18" H