SunEX™ Lightweight Woven Nylon Wickaway Fabric (Sold per yard) The SunEX fabric is a clothing-weight sun-protective fabric made to block the Sun's UV rays, block stains and odor, and manage moisture. It has a cottony-soft hand for comfort and excellent breathability for warm weather comfort. "Excellent*" UPF rating, blocking 97.5-98+% of the sun's UV rays Antimicrobial finish to minimize growth of bacteria that cause stains and odor CIBA Moisture Management to promote wicking of moisture away from the body Uses This is a great fabric for shirts, blouses, neck kerchiefs, zip-off travel and hiking pants, and other lightweight wear. Excellent* UPF rating:*Below is the ASTM Standard for Sun Protective Clothing and Swimwear: UPF Rating Protection Category % UV radiation Blocked UPF 15 - 24 Good 93.3 - 95.9 UPF 25 - 39 Very Good 96.0 - 97.4 UPF 40 - 50+ Excellent 97.5 - 98+ According to recent testing by Consumer Reports, UPF ~30 is typical for protective fabrics, while UPF ~6 is typical for standard summer fabrics. Table from Wikipedia Sun Protective Fabrics Care Tips: In general, Sun Protective fabrics are easy to care for. They are fast-drying, stain-resistant, colorfast, and able to hold their shape. They're great to pack and travel with. Cold machine wash or lukewarm hand wash Do not dry-clean For best results, turn inside out when washing Do not use bleach Do not spot-clean with solvents. Use mild powdered detergents only when necessary Tumble-dry at low speed and temperatures For fabrics with some lycra content, hang or lay flat to dry Do not iron with a hot iron. Use a cool iron if necessary