1.40% semi transparent, ing a balance between privacy and light. The patented fabric blocks 60% of direct light while allowing soft, natural light (compared to 30% privacy of generic semi sheer fabrics). ASTM G173 UV Certified (92% UV Block) to prevent fading tested up to over 300 days in Arizona Sun 2.Tool installation in 3 minutes. Ready to hang, 72' L x 51' W, fitting 90% of US balconies and avoiding multiple panel problems 3.High density polyester waterproof coating, withstanding the daily drizzle on the patio/balcony (water splash test: water drops slide down naturally, no penetration in 30 minutes), saying goodbye to the embarrassment of wet curtains in the rainy season 4.Mildew proof and stain resistant. Suitable for damp areas. With surface stain resistant treatment, coffee/juice splashes can be easily wiped off; the lower ventilation design reduces water accumulation and mould (tested in the southern rainy season no mould stains after 15 consecutive days of humidity). Machine washable without deformation (gentle cold water mode. User tested: still crisp after 10 washes)