{"product_id":"shademart-16-ft-x-21-ft-grey-sun-shade-sail-upf50-heavy-duty-patio","title":"ShadeMart 16 ft x 21 ft Grey Sun Shade Sail UPF50 - Heavy Duty Patio","description":"\u003cp\u003eIn this review the ShadeMart 16 ft x 21 ft grey sun shade sail is evaluated as a heavy duty, breathable canopy for outdoor spaces; it is best for homeowners and small businesses who need broad UV protection and durable construction rather than a fully waterproof cover. The single biggest reason to buy is the fabric's combination of woven HDPE material and stainless steel D rings, which provide long-term durability and block up to \u003cstrong\u003e95% of harmful UV rays\u003c\/strong\u003e while allowing air and water to pass through, keeping temperatures noticeably lower under the sail.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Woven HDPE fabric resists tearing and holds shape, making it suitable for sustained outdoor 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 help lower surface temperatures beneath the canopy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBreathability:\u003c\/strong\u003e Water permeable design lets rain and air pass through so the sail does not pool water and stays ventilated in warm weather.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardware:\u003c\/strong\u003e Stainless steel corner D rings attached to heavy duty white webbing provide reliable anchor points and ease of installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustom Sizes:\u003c\/strong\u003e Available in multiple custom dimensions so you can order a sail to fit patios, carports, or poolside spaces more precisely.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDecorative Styling:\u003c\/strong\u003e Rectangle shape and neutral grey color integrate with most outdoor designs while providing functional shade.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThe ShadeMart 16 ft x 21 ft sail is ideal for homeowners, small business owners, and outdoor hobbyists who want broad UV protection across a patio, carport, pergola or over a boat without creating a waterproof roof. Its breathable HDPE fabric and sturdy stainless steel D rings suit locations where wind and occasional hail are concerns but complete rainproof coverage is not required.\u003c\/p\u003e\u003cp\u003eThose who need a fully waterproof canopy, or who require integrated grommets and tensioning hardware included in the package, may want to consider a different product or purchase a separate hardware kit; this sail focuses on fabric quality, UV blocking and custom sizing rather than being advertised as waterproof or as a complete mounting kit.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDurable woven HDPE fabric stands up to sun and retains color, reported by users as long lasting.\u003c\/li\u003e\n\u003cli\u003eBlocks up to 95% of sunlight, noticeably cooling shaded areas by about 10-15 degrees according to product notes and user experience.\u003c\/li\u003e\n\u003cli\u003eStainless steel D rings and heavy webbing make attachment secure and installation straightforward.\u003c\/li\u003e\n\u003cli\u003eWater permeable design prevents pooling and encourages airflow under the sail.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eNot waterproof, so it will not provide full protection during heavy rain or for items that need to stay dry.\u003c\/li\u003e\n\u003cli\u003eShade sails require careful measuring and separate hardware for mounting, which adds steps before installation.\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\u003e16 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\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, UPF50 UV resistant\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUse Cases\u003c\/td\u003e\n\u003ctd\u003ePatio, carport, pergola, tent, pool, yard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe ShadeMart 16 ft x 21 ft grey sun shade sail is a solid choice for anyone who wants durable UV protection and better outdoor comfort without a waterproof roof. It offers excellent UV blocking, robust corner hardware, and breathable fabric that prevents water pooling, making it good value for patios, carports and poolside shade projects when paired with the appropriate mounting kit.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eIs this shade sail waterproof?\u003c\/strong\u003e\u003cbr\u003eNo, this style is water permeable and breathable so it will not act as a waterproof cover in heavy rain.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat hardware is included?\u003c\/strong\u003e\u003cbr\u003eThe product description notes stainless steel D rings attached to heavy duty webbing on the corners; mounting hardware kits are not specified and may need to be purchased separately.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan it be custom sized?\u003c\/strong\u003e\u003cbr\u003eYes, ShadeMart offers a selection of custom sizes but customers should measure the installation area accurately before ordering.\u003c\/p\u003e","brand":"ShadeMart","offers":[{"title":"Default Title","offer_id":48197363892443,"sku":"B0B5M34H36","price":167.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/816THzWgLIL._AC_SL1500_8d454552-026b-4696-b636-6f1d523ef938.jpg?v=1770206551","url":"https:\/\/gearmusthave.com\/products\/shademart-16-ft-x-21-ft-grey-sun-shade-sail-upf50-heavy-duty-patio","provider":"GearMustHave","version":"1.0","type":"link"}