【Premium Material】The 55% Tencel Lyocell and 45% cotton cover fabric has a higher moisture management capacity, keeping your skin cool and dry all night without generating extra heat and perspiration. The mattress pad is filled with 90% feather and 10% down to provide more support and softness for your back. 【Stable Anchor Bands】The mattress topper has four corner anchor straps, anti-movement stabilizing straps that hold the mattress in place so it won't slip no matter how you twist and turn in bed, and easy disassembly. 【Quilted fit Mattress Pad】This mattress features an end-to-end sewn through box construction that effectively prevents down and feathers from shifting. And each square box is evenly filled to keep you comfortable from head to toe and provide optimum pressure relief. 【Size and Clean】Available in four sizes, Twin:39"x75"Weight 48oz, Full:54"x75"Weight67oz, Queen: 60"x 80"Weight 80oz, King: 78"x80" Weight 103oz. Due to the feather and down filling, the mattress can only be Dry Cleaned, not machine washed, for longer life. 【Certificates】All our down materials meet the Responsible Down Standard (RDS). This means that the down and feathers come from animals that have not been subjected to unnecessary suffering.