40s灰色高端气密布以高强聚酯纤维为基材，表面复合PVC或TPU涂层，克重500-1280g/m²、厚度0.38-0.9mm，兼具高气密性、抗撕裂、耐候阻燃等特性，适用于充气城堡、帐篷、救生筏等场景，支持定制颜色幅宽，选购需关注厂家资质与环保认证。

40s gray high-end airtight cloth is made of high-strength polyester fiber as the substrate, with a surface composite of PVC or TPU coating. It weighs 500-1280g/m ² and has a thickness of 0.38-0.9mm. It has high airtightness, tear resistance, weather resistance, flame retardancy and other characteristics, and is suitable for inflatable castles, tents, life rafts and other scenarios. It supports customized color widths. When purchasing, attention should be paid to the manufacturer's qualifications and environmental certification.