{"product_id":"shademart-17ft-x-21ft-white-sun-shade-sail-upf50-rectangle","title":"ShadeMart 17ft x 21ft White Sun Shade Sail UPF50 Rectangle","description":"\u003cp\u003eIn this review of the ShadeMart 17' x 21' white sun shade sail, the bottom line is simple: it is a heavy duty, breathable rectangle canopy best for homeowners and small businesses who need reliable UV protection and airflow without creating a waterproof cover. The reviewer found the woven HDPE fabric and stainless steel D rings make installation straightforward and durable, while the water permeable design lets rain and breeze pass through so it lowers temperature and avoids ponding. This is a practical choice when shade, durability, and appearance matter more than full waterproofing.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n \u003cli\u003e\n\u003cstrong\u003eWoven HDPE fabric:\u003c\/strong\u003e provides strong UV protection while remaining breathable so heat is reduced and air circulates under the canopy.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eStainless steel D rings:\u003c\/strong\u003e are attached to heavy duty white webbing to give reliable anchor points for long-term tensioning and repeated use.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eWater permeable design:\u003c\/strong\u003e allows water to pass through the fabric, preventing pooling and reducing wind load on the sail during storms.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eUPF50 protection:\u003c\/strong\u003e blocks up to 95% of harmful UV rays to help lower temperatures by roughly 10 to 15 degrees under shade.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eCustom size options:\u003c\/strong\u003e available in multiple measurements so buyers can choose a rectangle that matches patios, carports, pergolas or pool areas.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eDecorative styling:\u003c\/strong\u003e the clean white rectangle integrates with outdoor design and can be mounted to poles, trees, walls, or roofs with proper hardware.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe ShadeMart 17' x 21' rectangle sail suits homeowners, boat owners, and small commercial spaces that need broad UV protection without a solid roof; it works well over patios, carports, pergolas and pool seating where airflow and reduced heat are priorities. Installers who plan to anchor to existing structures like trees, poles, or walls will appreciate the reinforced D ring corners and heavy webbing.\u003c\/p\u003e\n\u003cp\u003eIt is not the right choice for buyers who need a waterproof canopy or full rain protection, or for users who require exact inch-perfect bespoke seams for structural roofing; the product is designed for breathable shade and may have small variations in side lengths due to manual measurement.\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 fabric that keeps sun off sensitive areas and holds up to wind and hail reported by customers.\u003c\/li\u003e\n \u003cli\u003eStainless steel D rings and heavy webbing provide sturdy anchor points for secure installation.\u003c\/li\u003e\n \u003cli\u003eBreathable, water permeable construction prevents water pooling and reduces heat beneath the sail.\u003c\/li\u003e\n \u003cli\u003eCustom size options and clean styling make it flexible for many outdoor spaces.\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 areas dry during heavy rain or be a substitute for a solid roof.\u003c\/li\u003e\n \u003cli\u003eManual measurement tolerances mean side lengths may vary slightly, requiring careful measuring before purchase.\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\u003e17ft x 21ft\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\u003eCorner Hardware\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 permeable, breathable, UV resistant (UPF50)\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eTypical Use\u003c\/td\u003e\n\u003ctd\u003ePatio, carport, pergola, pool, yard, window shade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe ShadeMart 17' x 21' white rectangle sail is a practical, value-minded choice for anyone who needs durable UV protection and airflow for outdoor spaces; its woven HDPE and reinforced corners make it reliable for long-term shade, while the water permeable design avoids pooling. Choose this if you want solid sun blocking and breathability, but look elsewhere if you need a waterproof canopy.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this shade sail waterproof?\u003c\/strong\u003e\u003cbr\u003eNo. The fabric is water permeable and breathable, so it allows water to pass through rather than creating a waterproof cover.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow much UV protection does the sail provide?\u003c\/strong\u003e\u003cbr\u003eThe sail blocks up to 95% of harmful UV rays (UPF50), which helps reduce temperature under the canopy by roughly 10 to 15 degrees.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan it be attached to trees, poles or walls?\u003c\/strong\u003e\u003cbr\u003eYes. With appropriate mounting hardware, the stainless steel D rings and heavy webbing let the sail be attached to poles, trees, walls or roofs.\u003c\/p\u003e","brand":"ShadeMart","offers":[{"title":"Default Title","offer_id":48637941186779,"sku":"B0B6B13W6P","price":173.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/91DmqjpB52L._AC_SL1500_efb9b422-eff0-4348-9528-a1dddb8eed69.jpg?v=1778733241","url":"https:\/\/gearmusthave.com\/products\/shademart-17ft-x-21ft-white-sun-shade-sail-upf50-rectangle","provider":"GearMustHave","version":"1.0","type":"link"}