The back of the Athmos Shape backpack is of the Aeroshape type: a very comfortable system that conforms to the curves of the spine and comfortable materials improve carrying comfort. The mesh material of the back panel is made entirely of recycled fiber. - Aeroshape back panel cushioned with EVA foam - The fabric is recycled polyester - A dedicated pocket for a separately available drink bag - Two open side pockets - Two zippered front pockets - Zippered pocket on the hip belt - Rain cover as standard - Bluesign and Green Button certified - The product does not contain PFC compounds