Similar to Lily silk duvets, each of our silk filled mattress toppers is hand filled layer by layer with 100% naturally long mulberry silk floss and being cased in a 350 thread-count pure soft cotton sateen exterior, enabling the topper to breathe against your skin. It comes with tough elastic bands around the four corners which you can simply hook on the corners of the mattress. It is compacted like a sleep pad and is made to fit exactly on the top of the mattress for tidy fitting. It is great for Sensitive Person, because silk is naturally hypo-allergenic so it is great for allergy sufferers like hay fever, and is also beneficial to those who suffer aches and pains when sleeping. Our silk is made completely from 100% natural and pure silk produced by the Bombyx Mori silkworms, the undisputed best quality silk in the entire world. Lilysilk silk bedding are made with silk floss made from the best quality long stranded Mulberry silk to ensure fluffiness, volume and of course, heat insulation. Naturally hypoallergenic and thermal adjusting, our pillows are suitable regardless of weather and temperature, providing you with great comfort and health benefits, keeping you sound asleep at night and fully rejuvenated in the morning. Silk bedding is naturally hypoallergenic and is an environment dust mites find inhospitable. Using silk bedding can significantly help reduce the number of dust mites living in bedding. The reduction of dust mites can have a direct effect on the quality of sleep to those who suffer from dust mite related allergies.