They are made from 100% cotton for enhanced durability and lasting comfort. The fine and close-knitted yarn allow added elasticity to ensure a precise fit for your Tempur or another mattress. All materials used in the manufacturing of this item have been tested and are free from harmful chemicals such as chlorine and formaldehyde. Features: Easy-care with anti-crease properties The cotton is merchandised to have greater strength The fabric is also treated to a singeing process which burns off any protruding fibers or loose yarns that are not firmly bound to the fabric and gives it a smoother appearance and feel Machine Washable Mako cotton is made from a limited range of yarn Mako Cotton is extremely strong, hardwearing and known for its moisture absorbing properties. What's in the box 1 x TempurFit Fitted sheet 90x190/200x15 White