Material: Washed Cotton. The fabric is soft, delicate and comfortable, skinfriendly, breathable and sweatabsorbent. Fit and compatibility: 15 cm means it fits mattresses 210 cm . 25 cm means it fits mattresses 823 cm . 40 cm means it fits mattresses 2035 cm . Package contains fitted sheet*1 without pillowcase. Performance and durability: Breathable cotton sheets maintain a constant supply of fresh air to the body. Fitted sheets are soft, comfortable and exceptionally durable. It has tensile strength, making it strong, durable and less likely to rip or tear. The fabric is strong and maintains brightness. Fit and finish: These fitted sheets with all around elastic add a secure fit and ease of movement. Use scenarios: Use in a master bedroom or guest room where mattress heights vary, ensuring a snug fit across different beds. Suitable for dormitories or rental properties with multiple bed sizes that require reliable, longlasting fitted sheets. Ideal for households seeking breathable, durable bedding that remains comfortable through regular use.