Abstract: A backpack (10) comprises a pair of shoulder straps (16), each including a strap adjustment device (17). Each strap is adjustable with a one handed operation by pressing an activation element (18) to release a strap securing element (22) within the device (17). The securing element enables movement of the strap when pulled in a first direction (B) while locking movement of the strap from movement in a second direction (A). The strap (24) includes a ratchet surface (23) that engages with the strap securing element (22).