{"product_id":"shademart-12ft-x-21ft-blue-sun-shade-sail-upf50-rectangle-breathable","title":"ShadeMart 12ft x 21ft Blue Sun Shade Sail UPF50 Rectangle - Breathable","description":"\u003cp\u003eIn this review of the ShadeMart 12ft x 21ft Blue Sun Shade Sail the bottom line is simple: this rectangle canopy is for homeowners and small-business users who want large, breathable UV protection without a hard roof. The reviewer found it especially useful for patios, carports and poolside shade because the woven HDPE fabric blocks up to 95% of UV while remaining water permeable, which prevents pooling and reduces ambient temperature by roughly 10 to 15 degrees. Installation is straightforward with proper hardware, and the heavy duty D rings and webbing feel robust for outdoor use.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e woven HDPE fabric provides a sturdy, lightweight canopy that stands up to sun exposure without trapping heat.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUV protection:\u003c\/strong\u003e blocks up to 95% of harmful rays so shaded areas stay noticeably cooler for comfort and sun safety.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater permeability:\u003c\/strong\u003e breathable, water permeable weave allows rain and air to pass through, preventing sagging and water pooling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardware quality:\u003c\/strong\u003e stainless steel corner D rings attached to heavy duty white webbing give secure anchor points that resist corrosion.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustom sizing:\u003c\/strong\u003e available in multiple sizes, allowing buyers to choose a sail to fit patios, carports, pergolas and more when measured accurately.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStyling:\u003c\/strong\u003e rectangle shape and color options make the sail a decorative addition that integrates with outdoor design.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThe shade sail is ideal for homeowners with patios, pool areas or carports who need strong sun protection and prefer a breathable, decorative canopy rather than a solid roof. It suits renters and DIY installers who can attach the sail to existing structures like poles, walls or trees using the right hardware.\u003c\/p\u003e\u003cp\u003eThose who need a fully waterproof cover or an exact factory-cut rectangle may want to consider other options; the fabric is intentionally water permeable and custom sizes are subject to manual measurement variance, so exact dimensions should be checked before ordering.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHigh UPF and sun blocking capability that meaningfully reduces temperatures in shaded areas.\u003c\/li\u003e\n\u003cli\u003eDurable construction with stainless steel D rings and heavy webbing for reliable anchoring.\u003c\/li\u003e\n\u003cli\u003eBreathable, water permeable fabric avoids pooling and performs well in variable weather.\u003c\/li\u003e\n\u003cli\u003eCustom size options and attractive rectangle styling work well for many outdoor spaces.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eNot waterproof by design, so it will not keep an area dry during heavy rain.\u003c\/li\u003e\n\u003cli\u003eSome buyers report size variations and slight deviation from a perfect rectangle due to manual measurement.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\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\u003e12ft 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\u003eUV Block\u003c\/td\u003e\n\u003ctd\u003eUp to 95% (UPF50)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWaterproof\u003c\/td\u003e\n\u003ctd\u003eNo, water permeable\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\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe ShadeMart 12ft x 21ft rectangle shade sail is a practical, good-value option for anyone needing large, breathable sun protection that also looks attractive over a patio, pool or carport. Its UPF50 performance, durable D rings and water-permeable weave make it especially well suited to outdoor living spaces, though buyers should measure carefully since sizes are customized and the sail is not intended to be waterproof.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eIs this shade sail waterproof?\u003c\/strong\u003e\u003cbr\u003eNo, the fabric is water permeable and designed to allow water and air through rather than provide a waterproof cover.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan it be attached to trees, poles or walls?\u003c\/strong\u003e\u003cbr\u003eYes, with proper hardware kits it can be anchored to poles, trees, walls or roofs; use secure fittings for safety.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much UV protection does it offer?\u003c\/strong\u003e\u003cbr\u003eThe sail blocks up to 95% of harmful UV rays and is rated at UPF50, which reduces sun exposure and helps lower temperatures beneath the canopy.\u003c\/p\u003e","brand":"ShadeMart","offers":[{"title":"Default Title","offer_id":48648261501147,"sku":"B0B69XV438","price":144.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/91CyVuDkKhL._AC_SL1500_4819a4e6-d6f7-4db5-836f-f1cd99b19c6b.jpg?v=1778562885","url":"https:\/\/gearmusthave.com\/products\/shademart-12ft-x-21ft-blue-sun-shade-sail-upf50-rectangle-breathable","provider":"GearMustHave","version":"1.0","type":"link"}