a new non - slipping shoulder strap assembly for helping a users to securely carry bags on their shoulder . the inventive device includes an elongate shoulder strap for resting on a first shoulder of a wearer and having a shoulder resting portion and a pair of end portions to which a load may be attached . an elongate armpit strap is coupled to the shoulder strap resting portion and extends around the torso under a second shoulder . a waist strap is coupled to the shoulder strap end portions and extends around a waist underneath the second shoulder .