The canopy material determines both the lifespan and the protective quality of the product. For sun protection, ensure the fabric has a UPF 50+ rating, which blocks 98% of UV rays. For water repellency, look for Pongee fabric with a high thread count (190T or 210T) coated with a Teflon water-resistant finish, which allows the umbrella to dry almost instantly. If the umbrellas are for outdoor cafes or events, specify solution-dyed acrylic fabrics to ensure colorfastness (Grade 4 or higher) against prolonged sun exposure.