{"product_id":"13ft-x-21ft-grey-shademart-rectangle-shade-sail-heavy-duty-uv","title":"13ft x 21ft Grey ShadeMart Rectangle Shade Sail - Heavy Duty UV","description":"\u003cp\u003eIn this review the ShadeMart 13' x 21' grey rectangle shade sail is evaluated for homeowners and small commercial spaces who need reliable sun protection. The standout reason to consider it is the heavy duty construction: a 260 GSM 100% virgin HDPE fabric with integrated cable-reinforced edges and stainless super rings that focus pull strength where it matters, delivering durable shading and measurable temperature reduction on patios, carports, and pool areas.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy Duty Fabric:\u003c\/strong\u003e The exact 260 GSM virgin HDPE material offers a sturdy, tear-resistant surface that holds shape under tension and resists sun damage better than recycled alternatives.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Edge Cables:\u003c\/strong\u003e Built-in cable wires routed into the mounting rings concentrate the load on the cable, making edges far less likely to rip during strong pulls.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStainless Mounting Rings:\u003c\/strong\u003e Super rings of stainless steel provide corrosion resistance and durable anchor points for a long-lasting installation near coast or pool environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh UV Blockage:\u003c\/strong\u003e The fabric is laboratory-tested to block up to 95% of harmful UV, helping lower surface temperatures and protect people and furniture under the shade.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBreathable, Permeable Design:\u003c\/strong\u003e The permeable weave allows water to pass through so rain does not pool on the sail, reducing stress on the fabric and mounting hardware.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUV Stabilized Treatment:\u003c\/strong\u003e A UV stabilizer in the compound prevents premature drying, fading, and tearing compared with untreated recycled fabrics.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThe ShadeMart 13' x 21' sail suits homeowners who need a robust, commercial-grade shade for a patio, carport, poolside, or balcony and want a product that resists UV and holds up under tension. It is also a fit for small businesses or community spaces that require durable, breathable shade with clean lines.\u003c\/p\u003e\u003cp\u003eShoppers who need included hardware kits or prefer soft, non-technical setups may look elsewhere: installation requires separate hardware and cable ropes per D-ring, and proper tensioning is necessary to avoid sagging. Those wanting fully waterproof canopies should consider other awnings, since this sail is permeable by design.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eRobust 260 GSM virgin HDPE fabric that resists fading and tearing.\u003c\/li\u003e\n\u003cli\u003eIntegrated cable edges and stainless super rings increase long-term edge durability.\u003c\/li\u003e\n\u003cli\u003eBlocks up to 95% of UV and noticeably reduces surface temperature under the shade.\u003c\/li\u003e\n\u003cli\u003eBreathable fabric prevents water pooling in rain.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHardware kits and proper cable ropes are required and sold separately, adding to total cost and setup complexity.\u003c\/li\u003e\n\u003cli\u003eSome buyers report size and color expectations vary, so measure carefully and allow for slight differences in shade tone.\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\u003eSize (D-ring to D-ring)\u003c\/td\u003e\n\u003ctd\u003e13' x 21'\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e260 GSM 100% virgin HDPE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUV Blockage\u003c\/td\u003e\n\u003ctd\u003eUp to 95%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEdge Construction\u003c\/td\u003e\n\u003ctd\u003eBuilt-in cable wires integrated into stainless super rings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePermeability\u003c\/td\u003e\n\u003ctd\u003eBreathable, allows water to pass through\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHardware\u003c\/td\u003e\n\u003ctd\u003eSold separately; cable rope per D-ring required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe ShadeMart 13' x 21' grey rectangle sail is a practical, value-oriented choice for anyone needing reliable, heavy duty sun protection. Its 260 GSM virgin HDPE, integrated edge cables and stainless rings deliver durability and real temperature reduction, but buyers should budget for separate hardware and follow installation guidance to avoid sagging.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eDoes this sail block UV and reduce temperature?\u003c\/strong\u003e\u003cbr\u003eYes. Laboratory-tested fabric and UV stabilizer provide up to 95% UV blockage and noticeable temperature reduction under the shade.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs mounting hardware included?\u003c\/strong\u003e\u003cbr\u003eNo. Hardware kits and cable ropes are sold separately; one cable per D-ring is required and nylon ropes are not recommended.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill rain pool on the sail?\u003c\/strong\u003e\u003cbr\u003eNo. The breathable, permeable 260 GSM fabric allows water to pass through so no pooling should occur when installed with correct tension.\u003c\/p\u003e","brand":"ShadeMart","offers":[{"title":"Default Title","offer_id":48637934239963,"sku":"B0C84LFRZQ","price":411.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/913NyIqJU_L._AC_SL1500_eda2e074-211c-4aa8-9ed5-06ed7384c300.jpg?v=1778602784","url":"https:\/\/gearmusthave.com\/products\/13ft-x-21ft-grey-shademart-rectangle-shade-sail-heavy-duty-uv","provider":"GearMustHave","version":"1.0","type":"link"}