Nike SB RPM Backpack. The water-resistant Nike SB RPM Skateboarding Backpack offers a spot for all your gear, including your skateboard and your laptop. Skateboard-carrying straps on outside for hands-free storage. Separate padded laptop compartment stores up to a 15-inch laptop. Spacious main compartment for ample storage. Curved shoulder straps provide a comfortable fit. Water-resistant fabric helps protect your gear. Dimensions: 21" H x 13" W x 6.5" D. 100% polyester. Imported.