fitted sheets are made from organically grown 65% Bamboo Rayon and 35% Long Staple Cotton in a luxurious 400 thread count sateen weave. Blending together both bamboo and cotton allows the double bed sheet ( 135x190x40cm ) to feature high durability, breathability whilst being dust mite resistant and hypoallergenic. Naturally Antibacterial and Hypoallergenic - Bamboo is naturally antibacterial which helps to protect against skin irritation and allergies, and its hypoallergenic nature makes it suitable for sensitive skin. Our deep fitted sheets double bed are free from harmful chemicals. Temperature Control and Deep Fitted Design - Bamboo and cotton are extremely breathable and act as a natural insulator to aid coolness in the summer and warmth in the winter. A 40cm extra deep fitted sheet pocket and the all-around strong elastic band can hold them in place and bring you a perfectly restful sleep. A double sheet fitted pocket has a silky texture which will add a luxurious feel to your home.