{"product_id":"shademart-8-ft-x-21-ft-blue-sun-shade-sail-upf50-rectangle","title":"ShadeMart 8 ft x 21 ft Blue Sun Shade Sail - UPF50 Rectangle","description":"\u003cp\u003eIn this review of the ShadeMart 8 ft x 21 ft Blue Sun Shade Sail, the bottom line is simple: this rectangle canopy is for homeowners or DIY installers who want durable UV protection and breathable coverage for patios, carports or poolside areas. The most convincing reason to buy is the fabric: woven HDPE blocks up to 95% of harmful rays while remaining water permeable, so it reduces heat without trapping water during light rain. The review examines materials, usability and real-world performance to help decide if it fits a specific outdoor space.\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, long-lasting shade and blocks up to 95% of harmful UV rays for reliable sun protection.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eWater permeable design:\u003c\/strong\u003e allows water and air to pass through the canopy so the sail lowers temperature without collecting rainwater.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eStainless steel D rings:\u003c\/strong\u003e are attached to heavy duty white webbing for secure attachment points and improved durability at corners.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eCustom sizing available:\u003c\/strong\u003e multiple sizes and customization options let buyers fit the sail to unique patios, pergolas or carports when measured accurately.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eRectangle styling:\u003c\/strong\u003e offers a clean, versatile look that integrates into many outdoor layouts while providing broad coverage.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eMulti-use installation:\u003c\/strong\u003e with appropriate hardware the sail can be mounted to poles, trees, walls or roofs for flexible placement.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe ShadeMart rectangle shade sail is best for homeowners, renters with permission to anchor hardware, and small-business owners who need a rugged, breathable canopy that prioritizes sun protection and airflow over full waterproofing. It suits patios, carports, pool areas and yards where reducing temperature by 10 to 15 degrees is desirable.\u003c\/p\u003e\n\u003cp\u003eIt is less appropriate for buyers who require a fully waterproof shelter or for installations that demand perfectly rigid, factory-straight geometry; some buyers report size or shape variations from manual measurement, so those needing exact architectural fit should consider custom measurement options carefully.\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 heat reduction thanks to woven HDPE fabric and UPF50 performance.\u003c\/li\u003e\n \u003cli\u003eBreathable and water permeable construction prevents pooling and promotes airflow on hot days.\u003c\/li\u003e\n \u003cli\u003eDurable corner hardware with stainless steel D rings and heavy webbing for secure mounting.\u003c\/li\u003e\n \u003cli\u003eEasy to install for most DIYers and available in custom sizes for varied 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 during heavy storms.\u003c\/li\u003e\n \u003cli\u003eSize and edge straightness can vary with manual measurement, so expect minor shape or dimension differences.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n \u003ctr\u003e\n\u003ctd\u003eProduct shape\u003c\/td\u003e\n\u003ctd\u003eRectangle\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003e8 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\u003eBlocks up to 95% of harmful UV rays (UPF50)\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eHardware\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\u003eCustomization\u003c\/td\u003e\n\u003ctd\u003eCustom sizes available; measure venue accurately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe ShadeMart 8 ft x 21 ft Blue rectangle shade sail is a sensible choice for anyone prioritizing sun protection, airflow and durable corner fittings at a reasonable value. It excels at lowering temperatures and resisting UV damage while remaining easy to install, though it is not a substitute for a waterproof canopy. For patios, carports and poolside shade where breathability and UPF protection matter most, it delivers dependable performance.\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 but not waterproof, so it will not keep out heavy rain.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I customize the size?\u003c\/strong\u003e\u003cbr\u003eYes, custom sizes are offered but buyers should measure their venue accurately because manual measurements may cause slight variations.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat hardware do I need to install it?\u003c\/strong\u003e\u003cbr\u003eUse appropriate mounting kits or anchors such as turnbuckles, pad eyes or posts; stainless steel D rings and heavy webbing on the sail provide secure attachment points.\u003c\/p\u003e","brand":"ShadeMart","offers":[{"title":"Default Title","offer_id":48610119418075,"sku":"B0B69X1H8L","price":114.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/91CyVuDkKhL._AC_SL1500_97f33c27-9373-4354-ad1b-cbaef8fa4cf6.jpg?v=1778367100","url":"https:\/\/gearmusthave.com\/products\/shademart-8-ft-x-21-ft-blue-sun-shade-sail-upf50-rectangle","provider":"GearMustHave","version":"1.0","type":"link"}