The product can be categoized in two types，reinforced type and ordinary type. Subjected to special dipping treatment，high-tenacity nylon，polyester or vinylon-cotton blend canvas with high adhesive power is used as frame. The built-in with rope or nylon rope is laid in a certain angle between the canvas layers，and the outer layer of this type is adhered with fine quality covering rubber feathuring of high strength，good elasticity，resistance to shock, as well as resistance to wear and tear. The product is suitable for the working condition which convey bey materials, or it is of greater drop height greater impact force or prone to puncture.
