The multimat nato mattress 35 s sleeping mat has been made from premium quality polyolefin foam which is durable compact and warm making it ideal for unsupported expeditions the nato matress 35 s is standard equipment to the british armed forces and meets the nsn 8465 99 310 9203 requirements it also has been made from durable polyester fabric with a tpu membrane for an air tight seal and a non slip waterproof coating to make it suitable a range of conditions