Right inbetween our small and large backpacks you will find this medium size. It has an extra pocket on the front, waterproof lining with a handdrawn pattern and adjustable shoulder straps. On the inside you'll find an elastic band that serves as a bottle holder and a pocket all over the back that closes with velcro. There is also a name tag to put your info. 

sizes
– body - 23,5 x 13 x 32 cm
– volume - 10L
– front pocket - 19,5 x 14 cm
– shoulder handles - adjustable to a maximum length of 67 cm
– elastic band inside - 2,5 x 11 cm

materials
– body - recycled PET bottles
– shoulder handles - cotton
– front pocket - recycled shell fabric
– zipper - matt white YKK
– lining - waterproof nylon
– buckles - matt white metal