Fitted Sheet, Terry Type, Wide King, Suitable for Semi-Single to Wide King Sizes Regular product Squishy This product Be strong! Ideal sleeping posture that maintains the S-shape General mattress The heaviest part is from the back to the waist. The sinking is very stressful The burden on the sinking part... This product The firm center section provides firm support for your lower back. Supports good sleeping posture. Provides balanced support for the entire body! You can also choose the thickness to your liking. 6 cm 12cm