The Ergo Backpack attaches to the back of your Structured Baby Sling Carrier and allows you to tote some extra stuff and remain hands-free. This is great for day hikes and uneven terrain (oh heck, or the mall!) Designed as a day pack, the backpack easily snaps around the straps of the baby carrier, for an all-in-one baby carrier and day pack. Carry your baby and necessities for a day away from home, great for active parents who love to hike. Access into the sack is from the top with a solid bottom to help keep it's shape. This accessory is roomy and will hold a towel, diapers, swim clothes, change of clothes, snacks, sun screen, hats and more. Ergo Backpack Specifications: Snaps around straps of baby carrier with four relatch buttons Dimensions: 14" (36cm) high by 14" (36cm) wide by 4" (10cm) deep. 12 ounce 100% cotton canvas Top zipper has a 10" (26cm) wide opening Attached bottle holder Two front pockets Side zipper pocket for easy access when being worn Shoulder straps for independent use of baby carrier Top handle for easy toting