{"product_id":"shademart-16-ft-x-21-ft-red-rectangle-sun-shade-sail-upf50","title":"ShadeMart 16 ft x 21 ft Red Rectangle Sun Shade Sail - UPF50","description":"\u003cp\u003eIn this review of the ShadeMart 16' x 21' Red Sun Shade Sail the bottom line is clear: it is a straightforward, heavy-duty fabric canopy for anyone who needs large-area sun protection without trapping heat. The reviewer found it best for patios, carports, boats and backyard seating because the woven HDPE fabric blocks up to 95% of UV while remaining water permeable, so it reduces temperatures and avoids pooling. Installation is practical with stainless steel D rings and heavy webbing, and customers report strong color and durability under wind and hail.\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 block and breathability so the covered area stays cooler without trapping moisture.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStainless steel D rings:\u003c\/strong\u003e securely anchor the sail to whatever structure is available and resist corrosion in outdoor conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater permeable design:\u003c\/strong\u003e allows rain to pass through rather than pooling, reducing stress on attachment points and fabric.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustom size options:\u003c\/strong\u003e a range of custom sizes means the sail can be ordered to fit patios, carports or irregular outdoor venues when measured carefully.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRectangle styling:\u003c\/strong\u003e simple shape that integrates with many outdoor designs and provides large, consistent coverage for seating or vehicles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe ShadeMart rectangle sail is best for homeowners and small business owners who need an economical, durable shade solution for patios, poolside, carports, pergolas or boats and value UV protection and airflow over full waterproofing. It suits people who prefer a low-maintenance fabric that resists fading and stands up to wind and hail.\u003c\/p\u003e\n\u003cp\u003eIt is less suitable for buyers seeking a fully waterproof canopy or those who need a rigid structure; this model is explicitly water permeable and relies on proper tensioning and attachment hardware for best performance. Measure your site carefully before purchasing to ensure the rectangular shape and area meet your needs.\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\u003eBlocks up to 95% of harmful UV rays, noticeably lowering temperatures beneath the sail.\u003c\/li\u003e\n\u003cli\u003eDurable woven HDPE construction and stainless steel D rings give reliable long-term use in harsh conditions.\u003c\/li\u003e\n\u003cli\u003eWater permeable fabric prevents pooling and reduces wind load compared with solid tarps.\u003c\/li\u003e\n\u003cli\u003eAvailable in multiple colors and custom sizes to match 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 provide full rain protection or keep an area dry during heavy storms.\u003c\/li\u003e\n\u003cli\u003eShade sails require correct measurement and proper hardware to achieve a tight, effective installation.\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\u003e16' x 21'\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\u003eD rings\u003c\/td\u003e\n\u003ctd\u003eStainless steel attached to 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, UPF50 UV protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe ShadeMart 16' x 21' Red Sun Shade Sail is a practical value buy for anyone wanting large-area UV protection with good airflow and low maintenance. It performs well for patios, carports and boats, offering durable construction and easy anchoring, but buyers should not expect waterproof coverage and must plan attachment points and measurements in advance.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this shade sail waterproof?\u003c\/strong\u003e\u003cbr\u003eAnswer. No, the fabric is water permeable and designed to allow water through rather than act as a waterproof tarp.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it block the sun effectively?\u003c\/strong\u003e\u003cbr\u003eAnswer. Yes, the woven HDPE fabric blocks up to about 95% of harmful UV rays and reduces temperatures beneath the sail.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I mount it to trees, poles or a roof?\u003c\/strong\u003e\u003cbr\u003eAnswer. Yes, with proper hardware kits the stainless steel D rings and webbing allow attachment to poles, trees, walls or roofs.\u003c\/p\u003e","brand":"ShadeMart","offers":[{"title":"Default Title","offer_id":48619807801563,"sku":"B0B5M2R4GQ","price":167.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/A1gstAiWFwL._AC_SL1500_92d48ed6-f094-47ab-8ff3-e87e58e98a57.jpg?v=1778487551","url":"https:\/\/gearmusthave.com\/products\/shademart-16-ft-x-21-ft-red-rectangle-sun-shade-sail-upf50","provider":"GearMustHave","version":"1.0","type":"link"}