Double roof design facilitates ventilation and smoke diffusion, so it is truly ideal for BBQ activities.180g/m2 water-resistant and fire retardant polyester fabric with PA coating for effective harmful UV blocking and antioxidation. Meet CPAI-84 Flame Retardant Standard.Comes complete with waterproof strip on sewing place to make it more water-resistant.The supporting columns have pre-drilled holes for securing with screws or bolts on hard surfaces or spikes on soft ground.Dimension:250(L)x126(W)x250(H) cm