Various embodiments illustrated herein disclose a full body harness that includes a connector. The connector includes a first plate and a second plate, where the first plate is identical to the second plate. The first plate and the second plate includes a plurality of slits to facilitate passage of a first harness and a second harness therethrough. The first plate is rotatably coupled to the second plate such that they are rotatable with respect to each other. Such a connector automatically enables easy adjustment of the harness based on an activity of a user who is wearing the harness.

A buckle according to the present invention has two opposing ends that are removably attached to each other using a locking system. On one end of the buckle, the locking system includes two opposing locking pins coupled to a spring that is fully enclosed and protected from external elements. On the other end, corresponding rivets or pin casings with plungers are operable to receive the locking pins and lock the two ends together or push the pins out of the casings to release the buckle. The buckle may also include a plug that is removably attached to the adjustable loop end and allows the central bar of the adjustable loop end to be removed without deforming the central bar. Alternatively, each end of the buckle may include self-aligning tabs that guide the ends of the buckle for fastening and aid in the stability of the buckle.

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).

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).

A retention buckle features a frame with two adjacent roller pins with improved lateral movement and height adjustment features. The buckle has particular use for headbands and features a low-profile, contoured shape to accommodate a human head. Single and multiple headbands may be threaded through the buckle in a manner to allow easy and secure tightening while allowing easy disassembly when not in use. Varied height rollers and side members, and in an embodiment adjustable rollers and side members, allow for adaptation to different width headbands. Tool holders may also be incorporated into the architecture.

A retention buckle features a frame with two adjacent roller pins with improved lateral movement and height adjustment features. The buckle has particular use for headbands and features a low-profile, contoured shape to accommodate a human head. Single and multiple headbands may be threaded through the buckle in a manner to allow easy and secure tightening while allowing easy disassembly when not in use. Varied height rollers and side members, and in an embodiment adjustable rollers and side members, allow for adaptation to different width headbands. Tool holders may also be incorporated into the architecture.