{"product_id":"shademart-16ft-x-21ft-black-sun-shade-sail-upf50-rectangle-durable","title":"ShadeMart 16ft x 21ft Black Sun Shade Sail UPF50 Rectangle - Durable","description":"\u003cp\u003eIn this review the ShadeMart 16' x 21' Black Sun Shade Sail is judged as a practical, heavy duty option for homeowners and small businesses who want effective UV protection without a solid roof. The bottom line: it is best for anyone seeking a breathable, large rectangle canopy that blocks sunlight and lowers temperatures, with the single biggest reason to buy being the fabric's combination of \u003cstrong\u003eUPF50\u003c\/strong\u003e sun protection and robust woven HDPE construction that stands up to routine outdoor use.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n \u003cli\u003e\n\u003cstrong\u003eWoven HDPE material:\u003c\/strong\u003e The high density polyethylene fabric provides strong, tear-resistant coverage that maintains shape and blocks up to 95% of harmful UV rays.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eWater permeable design:\u003c\/strong\u003e The breathable weave allows water and air to pass through so the shade reduces heat without trapping moisture under the canopy.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eStainless steel corner D-rings:\u003c\/strong\u003e Corrosion-resistant D-rings attached to heavy duty white webbing give secure anchor points and long-term durability in outdoor conditions.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eLarge rectangle size:\u003c\/strong\u003e The 16' x 21' footprint creates generous coverage for patios, carports, poolside areas or pergolas to cool outdoor living space.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eCustom sizing available:\u003c\/strong\u003e Multiple sizes and custom orders are offered so buyers can match irregular venues when they measure their space accurately.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis shade sail is ideal for homeowners who need wide, continuous shade for patios, carports, pool areas or outdoor seating where airflow and UV protection matter more than full waterproofing. It suits renters or gardens where mounting to posts, trees or walls is practical and a lightweight, breathable canopy is preferred.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include buyers who need a fully waterproof awning or a rigid, permanent roof - this fabric is intentionally water permeable. Also, precise custom-sizing buyers should measure carefully because manual variations in sails can occur.\u003c\/p\u003e\n\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 from the \u003cstrong\u003eUPF50\u003c\/strong\u003e woven HDPE fabric reduces sun exposure and lowers ambient temperature.\u003c\/li\u003e\n \u003cli\u003eDurable hardware with stainless steel D-rings and heavy webbing gives reliable anchor points and longevity.\u003c\/li\u003e\n \u003cli\u003eBreathable, water permeable construction prevents pooling and improves airflow beneath the canopy.\u003c\/li\u003e\n \u003cli\u003eGood value and easy installation reported by customers, with many noting it performs well in wind.\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 keep out heavy rain and is intended primarily for shade rather than shelter.\u003c\/li\u003e\n \u003cli\u003eSize can vary slightly due to manual measurements, so accurate on-site measurement is important before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\n\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\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\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 corner 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 and breathable; not waterproof\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eApplications\u003c\/td\u003e\n\u003ctd\u003ePatio, carport, pergola, pool, yard, window shade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe ShadeMart 16' x 21' Black Sun Shade Sail is a sensible option for buyers who need strong sun protection, airflow and a durable fabric canopy at a reasonable price. It performs well as a large, decorative shade that lowers temperatures and resists wear, but those needing full rain protection should choose a waterproof alternative. Overall it offers clear value for outdoor shading where breathability and UV blocking are priorities.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this shade sail waterproof?\u003c\/strong\u003e\u003cbr\u003eThe fabric is water permeable and breathable, so it does not provide waterproof protection and allows water to pass through.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat mounting options are possible?\u003c\/strong\u003e\u003cbr\u003eWith the proper hardware kits the sail can be attached to poles, trees, walls, roofs or existing structures for patios, carports and pools.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it block sun effectively?\u003c\/strong\u003e\u003cbr\u003eYes; the woven HDPE material offers UPF50 protection and blocks up to 95% of harmful UV rays while reducing ambient temperature.\u003c\/p\u003e","brand":"ShadeMart","offers":[{"title":"Default Title","offer_id":48259041198299,"sku":"B08XN94X52","price":167.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/81KPSgNRfmL._AC_SL1500_a9f33f40-f7ee-4294-9f7b-c48b386d4355.jpg?v=1778330642","url":"https:\/\/gearmusthave.com\/products\/shademart-16ft-x-21ft-black-sun-shade-sail-upf50-rectangle-durable","provider":"GearMustHave","version":"1.0","type":"link"}