Material and construction Material: polycotton with a thick quilted brushed fabric that is soft, skinfriendly, and breathable Design: 360 degree allround elastic band with nonslip grip to keep the lying surface flat Fit: suitable for mattresses 3 to 25 cm thick Package includes: fitted sheet and two pillowcases (48 x 74 cm) Comfort and climate control Warmth in winter: the deep, thick fitted sheet creates a cozy cocoon to help you stay warm on cold nights Breathable in warmer weather: fabric remains breathable to reduce sweating and help the bed stay cool Fit and durability for box spring beds Thick fabric provides robustness and durability compared with standard sheets Breathable, elastic, and dimensionally stable to maintain a smooth surface over time fit achieved through the allround elastic band, helping the sheet stay in place Longlasting quality Carefully selected materials support a long service life Maintains color brilliance over time Use scenarios Box spring or platform beds: offers a secure, flat surface with a reliable, snug fit on thicker mattresses Winter nights: provides extra warmth and a cozy feel without bulk Summer use: breathable fabric helps keep the bed comfortable and cool Note: All specifications refer to the original product details, including mattress compatibility (325 cm), material composition (polycotton), and included items (fitted sheet and two pillowcases 48 x 74 cm).