The Therm-a-Rest Down Coupler is a luxurious mattress topper that makes quick work of joining two Therm-a-Rest mats together and offers an exceptional level of comfort and insulation for a great night s sleep making it a must for your next trip with your partner The duck down fill makes this coupler incredibly lightweight and highly compressible while the polyester outer makes it feel like you are sleeping on cotton bed sheets This regular sized topper is ideal for securely joining two mattresses with a combined width of 102cm 40 together flawlessly for an excellent night s sleep The Down Coupler is so quick and easy to put into place and it will hold the mattresses together securely thanks to the elastic trim and perimeter straps Why not team this fantastic Down Coupler with one of Therm-a-Rest s Quilts available seperately for exceptional comfort and a wonderful sleeping experience while camping with your loved one