British Army Inflatable Mat Thermal Sleeping Self Inflating Mattress Camping

49 x 20 inches give or take Stored unpacked as they are meant to be Inflates fine with couple blows at end needed if desired NSN 8465-99-310-9203 Going by number it’s a Multimat NATO Mattress 35-S Self Inflating Camping Mat MOD Green British Army Inflatable Mat Thermal Sleeping Self Inflating Mattress