The Gossamer Gear Thinlight Foam Insulation Pad is the sleeping pad of your minimalist dreams. With 12 different uses - from adding insulation to your sleep system to its use as an on trail yoga mat, there is every reason for a thinlight pad to be an essential part of your ultralight backpacking kit. The average weight of the new Thinlight pad remains the same as previous versions. R-Value: Gossamer has not determined a R Value or temperature rating for the closed cell foam due to its variable density - but based on thermal conductivity data compiled by an independent scientist, they estimate the R values to be 0.5 for the 1/8" Thinlight. Please note that some pads will feature scuffs, small air pockets, or creases. This is cosmetic and does not affect performance. The folded pad perfectly replaces the sit pad in a size medium pack without any trimming. NOTE: sizes may vary by up to A 1/2" length / 1.3 cm Features Ultralight Closed cell foam won&';t absorb water Durable Average Weight Folded - Total 3.3 oz (94 g) Dimensions: Folded: 10.7" x 19" x 1. Extended: 73.5" x 19" x 1/8" NOTE sizes may vary by up to A 1/2 in / 1.3 cm Materials Polyolenfin PE/EVA