National standard 0.43 thick gold fiberglass material, with a compact fabric surface, high temperature resistance, and non-flammability. Withstands temperatures up to 500°C, with a momentary melting point of 1100°C. Four sides are wrapped and perforated for excellent adhesion and durability. Made from alkali-free material for superior fire resistance. Four corner grommets provide reinforcement and can be used with ground stakes to prevent slippage. Prevents fire, scalding, provides heat insulation, and flame retardancy. Suitable for outdoor camping and grilling. Pad under the coal basin or grill. Note: Turns black after high-temperature burning, and drying may leave marks; this is normal. Parameters: Material: Fiberglass Size: S size 45*45cm, M size 80*60cm, L size 93*80cm Thickness: 0.43mm Weight: S size 189g, M size 331g, L size 448g Packaging size: 27*17.5*2cm