Clas Challenger Medium Backpack with Padded Shoulder Straps by Kipling. Playful and practical, the Clas Challenger offers the classic function of a medium-sized backpack with modern details. The adjustable shoulder straps have soft padding that's lined with rib fabric for comfort. A versatile series of pockets keep both large and small essentials organised. Side slip pockets with VELCRO closures are the perfect places for drinks and the small items you need on demand.