These backpacks are made of recycled PET bottles. On the front you find an extra pocket. The lining is waterproof. The zippers are from YKK and the shoulder handles are adjustable. On the inside you'll find an elastic bottle holder and a pocket all over the back that closes with velcro. On the name tag you can write down your name and contact details. sizes— backpack • 27 x 13 x 38 cm— shoulder handle • maximum length 67 cmmaterials— outside • recycled PET bottles + metallic crinkled polyester— inside • waterproof nylon— zipper • YKK zipper— piping • coloured cordThe better together collection is extra special. It is still made of recycled bottles but the yarn is woven in a different way which makes the fabric stronger and last longer. On top of this the yarn has the Global Recycled Standard certification. Aiming to reduce our footprint and let everybody enjoy our products even more.other details— front pocket— elastic bottle holder— name tag 1802181 - athletics track1802182 - gymnastic pink1802183 - olympic pool