DETACHABLE TETHER: The toddler rocket backpack seat belt leash is detachable. The detachable tethers for the littlest travelers easily attach to keep all stops in crowded spaces relaxed. And remove the tether to a Todder backpack. .MULTIFUNCTION WITH SAFETY LEASH: There is a spacious main compartment in the toddler backpack stores the kids toys, snacks and water bottle. With the transparent pocket in front to put small things and your baby's picture. Measuring in 8.7 x 4.5 x 10.8 inches (L x W x H), cannot fit an A4 book. .BOX PROTECTED BUCKLE BUCKLE: It features a buckle-fastening strap that prevents it from falling off during intense workouts. .LIGHT WEIGHT AND ENVIRONMENTAL NEOPRENE: The toddler backpack is only 420g / 14.8OZ. With ergonomic design, padded straps, ease the press of shouder. Perfect size for 3-6 year old kids. .PADDED ADJUSTABLE COMFY STRAPS WITH PROTECTIVE ZIPPER - The rocket toddler backpack's zipper pulls are rubber coated so little hands can get a good grip. The padded straps are easily adjustable to fit your boy's height/height. The padded straps are shock absorbing and improve comfort. .