A flexible folding sling includes a flexible elongate preform strap having first and second ends, each of the first and second ends folded inward toward a strap center to form respective first and second loops. The first and second ends are fastened to the strap center with each of the first and second loops having a half-twist such that each of the first and second loops is a tear-shaped Mobius loop. The flexible folding sling assists a user in carrying bag(s) having handles, or other objects that include handles or like structure. When used to carry bags, the sling can be configured as a hand-sling, a shoulder-sling or a back-sling. When used as a hand-sling, the sling engages the user's wrist in a secure and comfortable manner. This prevents load transmission through the easily tired hand muscles and ligaments, extending the amount of time the user can carry a load. This also allows the user to maintain use of her hand and fingers while the sling is used.