{"product_id":"shademart-15-ft-x-21-ft-grey-sun-shade-sail-upf50-rectangle","title":"ShadeMart 15 ft x 21 ft Grey Sun Shade Sail UPF50 Rectangle","description":"\u003cp\u003eIn this review the ShadeMart 15 ft x 21 ft Grey Sun Shade Sail is evaluated for homeowners and small businesses needing large, breathable sun protection. The bottom line: it is a sturdy, UV-blocking rectangle sail made from woven HDPE that significantly reduces temperatures and provides long-lasting coverage for patios, carports, and pool areas. The review focuses on durability, ventilation, and real-world installation, showing why this sail is best for outdoor areas where shade plus airflow matters rather than for users who need full waterproof coverage.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Woven HDPE fabric provides strong, tear-resistant coverage that remains breathable in all weather.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUV Protection:\u003c\/strong\u003e UPF50 construction blocks up to 95% of harmful UV rays, helping lower temperatures in the shaded area by roughly 10 to 15 degrees.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardware:\u003c\/strong\u003e Stainless steel D rings attached to heavy duty white webbing give secure anchor points that resist corrosion outdoors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater Permeability:\u003c\/strong\u003e The sail is water and air permeable, allowing rain to pass through rather than pooling, which reduces stress on attachments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustom Sizes:\u003c\/strong\u003e A wide range of custom sizing options is available so buyers can fit irregular venues when measured carefully.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStyling:\u003c\/strong\u003e The rectangle shape and neutral grey color integrate with many landscapes and contemporary outdoor designs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis shade sail is ideal for homeowners, landscapers, and small business operators who want large-area sun protection that improves comfort without trapping heat. It suits patios, pergolas, carports, poolside lounging spots and vegetable gardens where airflow and UV reduction are priorities.\u003c\/p\u003e\n\u003cp\u003eIt is not the best choice for buyers who need a fully waterproof canopy or those who prefer rigid, structured roofing; because the fabric is intentionally permeable, it will not keep heavy rain completely out and is designed to drain through rather than shed water like an awning.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDurable woven HDPE construction with reinforced stitching and stainless steel D rings increases longevity outdoors.\u003c\/li\u003e\n\u003cli\u003eExcellent UV blocking performance that cools shaded areas noticeably.\u003c\/li\u003e\n\u003cli\u003eBreathable, water permeable design prevents pooling and reduces wind load on fastenings.\u003c\/li\u003e\n\u003cli\u003eCustom size options and a simple rectangle form make it versatile for many mounting configurations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNot waterproof, so it will not keep an area dry during heavy rain.\u003c\/li\u003e\n\u003cli\u003eSize and color can vary slightly due to manual measurement and manufacturing, so careful measuring is required.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eShadeMart\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShape\u003c\/td\u003e\n\u003ctd\u003eRectangle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003e15 ft x 21 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eWoven HDPE (High Density Polyethylene)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUV Protection\u003c\/td\u003e\n\u003ctd\u003eUPF50, blocks up to 95% of UV rays\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHardware\u003c\/td\u003e\n\u003ctd\u003eStainless steel D rings with heavy duty white webbing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunctionality\u003c\/td\u003e\n\u003ctd\u003eWater and air permeable, not waterproof\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe ShadeMart 15 ft x 21 ft Grey Sun Shade Sail is a practical, value-oriented option for anyone who needs large, breathable sun protection that lasts. Its durable HDPE fabric, reinforced corners and strong D rings make it a reliable choice for patios, carports and pool areas; just remember it is designed to be permeable and not to replace waterproof roofing. For cooling and UV protection at a reasonable price, it is a solid buy.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this shade sail waterproof?\u003c\/strong\u003e\u003cbr\u003eThis style is water permeable and breathable, so it allows water to pass through rather than providing full waterproof protection.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan it be attached to trees and poles?\u003c\/strong\u003e\u003cbr\u003eYes, with the proper hardware kits the sail can be secured to poles, trees, walls, roofs or other structures using the stainless steel D rings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it really block UV rays?\u003c\/strong\u003e\u003cbr\u003eThe woven HDPE fabric is rated UPF50 and is stated to block up to 95% of harmful UV rays, which helps lower temperatures in the shaded area.\u003c\/p\u003e","brand":"ShadeMart","offers":[{"title":"Default Title","offer_id":48635381940443,"sku":"B0BTTZLTS4","price":160.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/816THzWgLIL._AC_SL1500_35630f95-9571-49e4-bbbf-537a1bbaa745.jpg?v=1778736291","url":"https:\/\/gearmusthave.com\/products\/shademart-15-ft-x-21-ft-grey-sun-shade-sail-upf50-rectangle","provider":"GearMustHave","version":"1.0","type":"link"}