Deluxe back release. Deluxe, all aluminum rear wheel locks. Weighs only 19 lb. 30% less than traditional transport chair. Aluminum frame for lightweight strength and durability. Composite wheels are lightweight and maintenance free. Comes with carry pocket on back rest. Both 17" and 19" come with swing-away footrests. Comes with sear belt for added safety. Soft, plush upholstery. Back folds down for easy storage and transport. 8" casters in front and rear.