Abstract: An adjustable harness is implemented by interweaving a cord throughout a woven portion of the harness to form a loop portion, an intermediate portion and an end portion. A length of the loop portion is selected by adjusting a length of the end portion. Once an appropriate length of the loop portion is selected, a locking mechanism attached to the intermediate portion ensures that the length of the loop portion remains fixed. A breakaway buckle may be attached to the adjustable harness and a carabiner may be attached to the breakaway buckle. In operation, a loop portion of the adjustable harness may be cinched down onto an accessory, such as a water bottle, and locked into place. A carabiner may then be attached to a user and the breakaway buckle may be used by the user to conveniently remove the accessory for use and then returned for storage.