This cage surpasses all other for durability, function and portability. The steel arch frames are rugged but lightweight at 45 lbs each and create a truly portable cage that expands and contracts for storage in less than 5 minutes.Anchored with web straps provided on each end, the rest of the cage is free standing and self-supporting. Simply raise the arch frames off the floor and walk to open or close cage quickly. 54' cage has four arch frames, 72' has five. #42 gauge knotless nylon netting. The wind has NO effect to this cage due to its shape and construction.