Unlined inflatable car mattress made of stronger material and Thermolite inner filling.
Each sleeping bag retains its performance only when used with adequate accessories, especially a suitable pad that insulates the sleeper in the direction away from the ground, the direction in which their heat is lost most quickly.
The inflatable pads in the Warmpeae range are aimed at the user who prefers strength and durability over maximum weight and volume limitations. Even so, the space and weight they take up in a backpack are surprisingly manageable.
Instructions for using the bag to inflate the mattress: