Premium Material: The RV Skylight Cover is made from Sponge, PP Cloth, and Aluminum Film, ensuring wear resistance, durability, and long term use RV Vent Insulator: This RV vent insulator can effectively block the exchange of air and heat inside and outside, ensuring your RV stays warm in winter and cool in summer, energy saving Anti Slip Design: The RV Vent Cover is equipped with anti slip silicone particles to ensure stable installation on skylights without slipping concerns With Reflective Surface: High reflection, offers wonderful energy saving performance Wide Compatibility: The RV Skylight Insulator is suitable for travel trailers, motorhomes, RVs, etc Size Chart:36cmx36cmx7cm/14.17inchx14.17inchx2.76inch Package Includes: 1 RV Skylight Cover Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.