FlexMat Plus is the thickest, most-comfortable closed-cell mat available. With 1.5” of air-trapping Flex-Cells™, it is highly versatile for stand-alone use and will increase warmth and puncture protection for inflatable mats. Because R-values are additive, FlexMat Plus’s R-value of 2.2 can boost a 3-season sleeping mat to 4-season efficiency. The folding form is quick to deploy and ensures a tidy load when attached to a backpack, bike or kayak.