The AVIATOR Bird Harness is the only truly safe bird restraint system and the only ESCAPE PROOF pet bird harness.The AVIATOR Bird Harness constitutes a new mindset necessary to provide safe and effective harness and leash restraint systems for birds.One piece design - No buckles or clips. Easy to install. Elastic wrist leash to absorb impact shock. Special collar design. Self-adjusting leash - Adjusts as bird climbs or flies. Increase flying distance by connecting to FLIGHT LINE or retractable cord leash. Available in 4 sizes; Cockatiels through Macaws. Complete with 40 min. DVD showing:- Installation and safe use of the AVIATOR Bird Harness - Training your pet to love the AVIATOR Bird Harness - Teaching old birds new tricks. - Teaching your bird to fly outside with the AVIATOR Bird Harness - Positive personality changes to expect.