Nike Elementa Shoeboxl Backpack Properties: The main compartment offers ample space for large books, so you can easily store your belongings. Front and side pockets are perfect for storing small items or a water bottle. As an added bonus, a shoebox-inspired pencil case can be attached to the outside. 30.5 (w) × 45.5 (h) × 12.5 cm (d). Handle. Adjustable straps. 100% polyester;Nike Elementa Shoeboxl Backpack Properties: The main compartment offers ample space for large books, so you can easily store your belongings. Front and side pockets are perfect for storing small items or a water bottle. As an added bonus, a shoebox-inspired pencil case can be attached to the outside. 30.5 (w) × 45.5 (h) × 12.5 cm (d). Handle. Adjustable straps.