{"product_id":"shademart-17ft-x-21ft-white-sun-shade-sail-upf50-rectangle-durable","title":"ShadeMart 17ft x 21ft White Sun Shade Sail UPF50 Rectangle - Durable","description":"\u003cp\u003eIn this review the ShadeMart 17' x 21' White Sun Shade Sail is judged on practicality and build quality for homeowners and small business owners who need affordable UV protection. The bottom line: this rectangle shade sail is a straightforward, heavy-duty choice for cooling patios, carports, and pool areas because it uses woven HDPE fabric that blocks up to 95% of UV rays while remaining water and air permeable. Our review focuses on real-world use, durability, and whether it delivers cooler, shaded space without claiming to be waterproof.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n \u003cli\u003e\n\u003cstrong\u003eWoven HDPE fabric:\u003c\/strong\u003e The material blocks up to 95% of harmful UV rays while remaining breathable so heat is reduced and airflow continues.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eStainless steel corner D rings:\u003c\/strong\u003e Heavy-duty stainless D rings attached to white webbing give reliable anchor points that resist corrosion outdoors.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eWater and air permeable:\u003c\/strong\u003e The sail allows water to pass through so rain will not pool on the fabric and wind load is reduced by airflow.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eCustom size options:\u003c\/strong\u003e A wide selection of sizes is available so users can order closer to their venue dimensions for a neater fit.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eDecorative rectangle shape:\u003c\/strong\u003e The simple geometric styling integrates easily with patios, pergolas, and yards without overwhelming existing design.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe ShadeMart 17' x 21' White Sun Shade Sail suits homeowners who want a large, economical canopy for patios, porches, carports, or poolside areas and value UV protection and airflow over full waterproofing. It also fits renters and DIYers who can attach the sail to trees, poles, or walls using proper hardware kits.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include buyers needing a fully waterproof cover or precise, guaranteed fit without measuring; this style is explicitly not waterproof and manual measurement variance can affect fit, so a custom-fabricated waterproof awning would be a better choice for covered outdoor kitchens or enclosed seating.\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\u003eHigh UV protection and measurable cooling from the breathable HDPE fabric.\u003c\/li\u003e\n \u003cli\u003eDurable hardware with stainless steel D rings and heavy webbing for secure anchoring.\u003c\/li\u003e\n \u003cli\u003eEasy to install for most DIYers and versatile mounting options to poles, trees, or walls.\u003c\/li\u003e\n \u003cli\u003eGood value for size and durability compared with other nonwoven covers.\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 does not keep an area dry during rain.\u003c\/li\u003e\n \u003cli\u003eSize may vary due to manual measurements, so careful measuring is required before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n \u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eRectangle shade sail\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 protection\u003c\/td\u003e\n\u003ctd\u003eUp to 95% block of harmful UV rays\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eCorners\u003c\/td\u003e\n\u003ctd\u003eStainless steel D rings attached to heavy duty white 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 \u003ctr\u003e\n\u003ctd\u003eUses\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 Sun Shade Sail is a practical, value-driven canopy for anyone prioritizing UV protection, airflow, and durability over waterproofing. It delivers strong shade, corrosion-resistant hardware, and flexible mounting options, making it a sensible pick for patios, carports, and pool areas where cooling and sun blockage are the main goals.\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 sail is water permeable and breathable by design and is not waterproof, so it will not keep an area dry in rain.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow much UV protection does it provide?\u003c\/strong\u003e\u003cbr\u003eThe woven HDPE fabric blocks up to 95% of harmful UV rays, which helps lower temperatures under the sail.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I install it on trees or poles?\u003c\/strong\u003e\u003cbr\u003eYes, with the proper hardware kits the sail can be attached to poles, trees, walls, roofs, and similar structures.\u003c\/p\u003e","brand":"ShadeMart","offers":[{"title":"Default Title","offer_id":48227291168987,"sku":"B08XNGBCDH","price":173.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/91DmqjpB52L._AC_SL1500_09164744-be71-48ad-8336-f186c2f630ed.jpg?v=1770839505","url":"https:\/\/gearmusthave.com\/products\/shademart-17ft-x-21ft-white-sun-shade-sail-upf50-rectangle-durable","provider":"GearMustHave","version":"1.0","type":"link"}