【Grade 1 Blackout】 By using full-dull yarn for the warp and black yarn for the weft, and weaving them densely to increase the blackout effect, we have achieved a 99.9% blackout effect. It blocks out most of the outside light, allowing you to sleep comfortably day or night. Recommended for those who value simplicity and functionality. *Grade 1 blackout does not completely block out light. For those concerned about light leakage, we recommend darker colors with a higher blackout effect. 【Heat Retention and Insulation】 The densely woven fabric suppresses rapid fluctuations in indoor temperature. In summer, it blocks out heat and improves the efficiency of air conditioning. In winter, it prevents the cold from outside and prevents warm air from escaping indoors, increasing heating efficiency. This also leads to savings on electricity bills. 【Installation Method】 Tension rods with a diameter of 2.0cm or less at both ends can be used. *Please prepare a compatible tension rod separately. Installation with curtain hooks is not possible. Suitable for any room, such as living rooms, bedrooms, and studies. 【Product Specifications】 *Composition: 100% polyester fabric, achieving a soft, silk-like feel and a matte texture. *Washable: Please wash in a laundry net on a delicate cycle. Please be aware that it may shrink due to high temperatures from dryers, irons, etc. *To optimize cost performance, we use simple packaging to focus on high-quality fabric and processing. *If you are concerned about creases, ironing along the pleats will improve them more quickly. 【Notes】 KUMORI curtains are planned in Japan and manufactured in overseas factories under strict Japanese quality control, so you can purchase with confidence. *The company name listed on the product packaging and washing label may differ from the brand name as it is the name of the manufacturer. Please understand this in advance. *The color of the product may differ slightly from the actual product depending on your monitor environment.