Pocket sized self inflating seat cushion. Temperature: down to about -5°C, R-Value 3.1; toxicfree ultralight foam; quality materials : next-to-skin comfort and effective slip-resistance; proprietary Exped laminate is airtight and impervious to degradation; proven combination FlatValve wich is non protruding and more durable than tradional valves for inflation and deflation with one way flap; stuffsack included.