1.Body fabric: T/C 280GSM water proof ,uv proof,water proof canvas, PU coating,w/p 2000m,strong ventilate. 2.Mattress: high-density and fire resistant sponge with 200cm*134cm*6cm. 3.Ladder: 2.3m strong aluminum alloy round ladder 4.Capacity: 250-300kg 5.Open: hydraulic automatic open 6.Up and down cover: strong ABS special treat s/s bracket,strong capacity. 7.Cover color optional: white and black