Downhill backpack has an SPS Flex BACK PROTECTOR, which combines the back system and protector into a FLEXIBLE UNIT. After outward applications of force, the VISCOELASTIC foam quickly returns to its original shape. Cushioning occurs in a near-linear fashion, keeps stress on the human body low. Backpack includes emergency card. In the case of an emergency, the card provides information about the injured person and therefore allows for faster and more efficient treatment.