PM2.5 Countermeasures, Heat-Shielding, and Privacy Lace Curtains (Catch C Sonic 100X133X2) Visibility Level: Day 5, Night 4 (Nitori's visibility level. There are 5 levels from 1 to 5, with higher numbers indicating it is more difficult to see from the outside.) *Visibility changes between day and night due to differences in lighting conditions. Adjustable hook for length. (A-hook specification for beautiful drapes) UV Cut Rate: 92% PM2.5 Capture Heat Shielding Effect: Blocks outside air and prevents room air from escaping. Privacy: Processed to make it difficult to see inside from the outside. Catches pollen in the air. Pollen washes off in the wash, and the effect lasts. Insulation Effect Rate: 36.6% Heat Retention Effect Rate: 30.6% Washable in a household washing machine.