HIGH QUALITY MATERIAL - Our sun shade sail is made of high-density polyester fabric, finished with the strong stitching seam and double-layer webbing for greater durability. UV&WATER RESISTANT - The sun shade sail can block strong UV rays and breathable material allows air to go through freely, providing a cool and comfortable space for you. With waterproof fabric, it is perfect for outdoor and fade-resistant. D-RING&GROMMETS DESIGN - With stainless steel D-Ring on each corner, our sun shade sail will strongly guarantee fastness of installation. The grommets are placed evenly on each side that will enhance strength for stability. WIDE APPLICATIONS - This sun shade sail with multiple colors and sizes is ideal for pergola, patio, garden, backyard, swimming pool, deck or any other outdoor areas. Constructed by straight edge to provide more shade and widely fuctional as screen. WARRANTY - 1 year limited warranty under normal use and weather. If you have any problem about our sun shade sails, please feel free to contact us. E&K Sunrise Sun Shade Sail  - Advanced Sun Shade  SailE&K  Sunrise Waterproof shade sails are an aesthetically pleasing option  that offer shelter from both the rain in wet weather and the sun on hotter days.Functionally, a waterproof shade sail is extremely  similar to outdoor shade sails, with the added use of PVC materials to  improve its weatherproof capabilities.Used to  your  patio, swimming pool area,  gardens, children's play areas, car spaces, or any  other outdoor area Can easily shield your  deck or patio from view and give  you  privacy from above Multiple colors and sizes for endless installation  ideas to make your backyard unique and   shady.How to take  measurement? 1.Measure  the distance from one post to the  next.2.Based on those   measurements, subtract 1-1.5 feet,For example, for a 13' x 13' x  13'  measurement, we suggest purchasing  12' x 12' x 12' Sunshade Sails due to our   special curved design that stretches in length.Notice:If  water is allowed to pool in the center of  the sail, it will slowly drip through, Some water may also drip through the  stitching on the seams, but if the sail  is installed at at 30-45 degree angle with enough tension, most rain  water  will run off,Please refer to the  installation   illustration.These sails should not replace a  tarp if  you need to keep something  100% dry,We really don't recommend to use it in  windy area as it can catch a lot of wind to  rip,Please choose our breathable  HDPE  sails if you are in windy area.This product does  not include sail  poles2 year limited  warranty