Double-size fitted sheet. Set of 3. 140 x 200cm Color: Blue Q-max is a value that quantifies the transfer of heat from human skin to an object; the smaller the value, the warmer it feels. The fabric of our fitted sheet has a Q-MAX of 0.095, providing instant warmth and coziness upon contact. The fitted sheet has 8mm long threads and excellent density, making it fluffy, soft, and able to retain a lot of warm air. ・【Moisture-absorbing and heat-generating wadding with acrylate + TEIJIN antibacterial, odor-resistant, and anti-mite wadding】 Absorbs moisture such as sweat from the body, generates heat, and warms the body. Uses "Teijin Mighty Top II ECO" antibacterial, odor-resistant, and anti-mite wadding, which inhibits the growth of bacteria and provides odor-resistant and anti-mite effects. Our fitted sheets can be used with peace of mind even for small children. ・【Heat-retaining wadding and insulation】 Uses heat-retaining wadding to lock in warm air and retain its heat, gently enveloping the body in natural warmth. ・【With aluminum sheet, heat insulation and warmth retention】 The aluminum sheet in the fitted sheet is a newly developed material that prevents the retained heat from escaping and insulates against cold air from the outside. ・【Easy to attach and detach, washable】 The four corners of the back side have "reinforced dobby elastic bands," so it can be securely fixed to futon or mattress and does not easily slip even when you turn over in your sleep. 4660.13.85.69