Heavy Duty fiberglass canopy. Super strong construction! Stand on top no problem. Roof rack ready for boat or what ever, roller at back makes loading easy. Load up with all your tools and supplies and lock em up. Stand full sheets of plywood on side and close the door! Build your own shelves in side to suit your needs. Have used this canopy for work and camping. Many Hunters have expressed interest as a hunting canopy . Self contained, lift off and on with camper jacks in a few minutes.