株式会社商環 runs a dedicated Fence Clear division producing sheet-type 防煙垂壁 from PVC-coated glass-fibre membrane certified as 不燃材料 under 国土交通大臣認定 numbers NM-3853 and NM-3400. The product is specified as a shatter-proof, lightweight substitute for glass smoke curtains in shops, warehouses and offices. Spun out as a standalone company in 2019, it works from Osaka with a Tokyo sales office.