- Updated windproof design with rustproof stainless steel grommets at the top and bottom keeps the curtains heavy and stable, preventing blowing and flapping, improving privacy while protecting from sun and rain. - Fabric and fit: Waterproof polyester suitable for indoor and outdoor use. The fabric is thick enough to provide shade. For best coverage, curtains should be 1.5 to 2.6 times wider than the window. Measure your curtain rod and room size before choosing pergola curtains. - Light and weather control: Triple weave blocks 85% to 99% of sunlight and heat. The fabric also keeps wind out and absorbs water so the curtains perform in a variety of weather conditions. Soft enough for indoor use or a solarium. - Indoor/outdoor suitability: Ideal for decks, patios, porches, pergolas or gazebos. Rust-resistant stainless steel grommets fit standard curtain rods up to 4 cm in diameter. - Use scenarios: Pergola or outdoor patio to reduce glare and provide privacy on sunny days; sunroom or solarium to control heat and light while maintaining visibility; covered balcony or patio to block wind and shield furnishings.