The flame-proof sheet is suitable for ensuring safety in construction sites and for complete environmental maintenance. This product has passed the strength test method of fire retardant material fire retardant test JIS The sheet is attached to the Fire Administrative Fire Retardant Label. Special PVC film bonding makes it highly weather resistant. Flame retardant sheets are not flammable, even if the fibers come into contact with small fires they will not burn out easily, even if you start a fire. It is also non-mesh, so wind and water wont pass through, making it ideal for outdoor footing. There are no refracts besides the seat.