NightComfort’s fitted sheets tend to have elasticated corners which have been designed so that they can be pulled over the mattress. This ensures a secure and snug fit. Material: Fitted bed sheets are made of 200 thread count Polycotton fabric (50% Cotton and 50% polyester), which is a good choice for those suffering from asthma, allergies, and other respiratory issues. Size and Colour: Plain dyed standard UK fitted bed sheet size is: King - 150 cm x 200 cm. Colour - Fuchia. Features: The polycotton mixture is made from a combination of cotton and polyester which is anxiety & stress relief and provides a better calming sleep for nights. It is naturally abrasion-resistant, wrinkle-free, and tear-resistant. Washing Instruction: Machine Washable at 90 Degrees and tumble dry on low heat with over 100 washes.