■ Brand Name: SEA TO SUMMIT ■ Product Name: 【Women's】Ether Light XT Extreme Mat Large ■ Product Model Number: ST81089 ■ Color: Black ■ Size: 64 x 183cm ■ Storage Size: 18.5 x 28cm ■ Material: 30/40D Nylon ■ Thickness: 10cm ■ R-value: 6.3 ■ Weight: 870g Thank you for viewing. I am selling this because my child was born, and I no longer have the opportunity to go to the winter mountains. I used it for about 20 nights, but there are no air leaks.