{"product_id":"shademart-17ft-x-21ft-black-sun-shade-sail-upf50-rectangle","title":"ShadeMart 17ft x 21ft Black Sun Shade Sail UPF50 Rectangle","description":"\u003cp\u003eIn this review of the ShadeMart 17' x 21' Black Sun Shade Sail, the bottom line is simple: this is a practical, heavy-duty rectangle canopy for anyone who needs effective sun protection without trapping heat. The reviewer found it especially useful for patios, carports and boat covers because the woven HDPE fabric blocks up to \u003cstrong\u003e95% of harmful UV\u003c\/strong\u003e while remaining breathable and water permeable. Installation requires basic hardware, but once in place the sail noticeably lowers temperature and provides large, even 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 a durable, tear-resistant surface that holds up to wind and sun exposure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUV Protection:\u003c\/strong\u003e Blocks up to 95% of UV rays to reduce sun exposure and lower ambient temperatures under the canopy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBreathability:\u003c\/strong\u003e Water permeable construction allows rain and air to pass through, preventing pooling and reducing wind lift.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardware Ready:\u003c\/strong\u003e Stainless steel D rings attached to heavy duty white webbing create secure anchor points for common mounting kits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustom Sizing:\u003c\/strong\u003e Available in multiple sizes so buyers can choose a rectangle to fit patios, carports, pergolas or boats.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis shade sail is best for homeowners and hobbyists who need a large, breathable sun canopy for outdoor living areas, carports, poolside lounges or boats. It is a good choice where airflow and water permeability are important to avoid heat buildup and standing water.\u003c\/p\u003e\n\u003cp\u003eThose seeking a fully waterproof shelter or a hard-roof carport replacement should look elsewhere, since this fabric is intentionally permeable and not rated as waterproof. Also, shoppers who want a pre-installed permanent structure may prefer a rigid awning rather than a tension-mounted shade sail.\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\u003eEffective \u003cstrong\u003eUV protection\u003c\/strong\u003e that noticeably cools covered areas and protects surfaces from sun damage.\u003c\/li\u003e\n\u003cli\u003eDurable construction with stainless steel D rings and heavy webbing for secure mounting.\u003c\/li\u003e\n\u003cli\u003eBreathable, water permeable fabric prevents pooling and reduces wind strain compared with solid tarps.\u003c\/li\u003e\n\u003cli\u003eEasy to install with standard hardware and adaptable to many mounting points like poles, trees or walls.\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 in steady rain.\u003c\/li\u003e\n\u003cli\u003ePrecise fit requires careful measurement because sizes are custom and may vary slightly by manual measurement.\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\u003e17 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 Rating\u003c\/td\u003e\n\u003ctd\u003eBlocks up to 95% of UV rays\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eStainless steel D rings with heavy duty webbing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater Resistance\u003c\/td\u003e\n\u003ctd\u003eWater 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 17' x 21' rectangle shade sail is a practical, cost-effective way to add breathable sun protection to a patio, carport or boat cover. It pairs durable HDPE fabric and stainless steel D rings for reliable performance in sun and wind; choose it if you need strong \u003cstrong\u003eUV protection\u003c\/strong\u003e and good airflow, but not a waterproof shelter.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this shade sail waterproof?\u003c\/strong\u003e\u003cbr\u003eThe fabric is water permeable, so it allows water to pass through and is not intended as a waterproof cover.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan it be mounted to trees or poles?\u003c\/strong\u003e\u003cbr\u003eYes, with the proper hardware kits it can be attached to poles, trees, walls or roofs using the stainless steel D rings.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it reduce temperature under the sail?\u003c\/strong\u003e\u003cbr\u003eYes, the woven HDPE fabric blocks most sunlight and can lower temperatures under the canopy by a noticeable amount.\u003c\/p\u003e","brand":"ShadeMart","offers":[{"title":"Default Title","offer_id":48618966647003,"sku":"B0B69SSX4P","price":173.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/81KPSgNRfmL._AC_SL1500_9fa72f5e-5265-41f6-98f7-176663197866.jpg?v=1778526636","url":"https:\/\/gearmusthave.com\/products\/shademart-17ft-x-21ft-black-sun-shade-sail-upf50-rectangle","provider":"GearMustHave","version":"1.0","type":"link"}