Years of research has determined that our Parrots will be healthier, more active and more confident when flighted. The harness has an elastic restraint so as not to do any harm when they reach the limits of the harness. The small harness fits Parrots from 190 - 450 grams such as Amazons (Lilac Crown, Blue Front) Timneh Grey, Yellow Collar Macaw, Small Cockatoos (Goffins, Major Mitchell, Galah, Lesser Sulfur) Large Parakeets, Chattering Lori, All Pionus. The one piece design makes it easy to put on and it comes with full instructions on a DVD. Add a Flight Line that is a tangle proof system allowing up to 250 feet of flight area. Also check out this great video from Good Bird, Inc. that offers some helpful tips on harness training your Parrot.