{"product_id":"shademart-21-ft-x-21-ft-blue-sun-shade-sail-upf50-square-breathable","title":"ShadeMart 21 ft x 21 ft Blue Sun Shade Sail UPF50 Square - Breathable","description":"\u003cp\u003eIn this review the ShadeMart 21 ft x 21 ft Blue Sun Shade Sail is evaluated for homeowners and outdoor hobbyists who need broad, breathable sun protection. The bottom line: this square UPF50 shade sail is best for patios, carports, pergolas and boat covers where durable UV blocking and airflow matter most. The reviewer found the woven HDPE fabric and stainless steel corner D rings deliver robust construction, while the water permeable design prevents pooling and reduces surrounding temperatures, making it a practical, low-maintenance canopy option.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Woven HDPE fabric provides strong, tear-resistant coverage that holds up to wind and everyday outdoor wear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUV Protection:\u003c\/strong\u003e UPF50 design blocks up to 95% of harmful UV rays, helping to lower temperatures under the canopy by roughly 10 to 15 degrees.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBreathability:\u003c\/strong\u003e The water permeable, breathable weave allows rain and air to pass through so water does not pool on the sail.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardware:\u003c\/strong\u003e Stainless steel corner D rings attached to heavy duty white webbing simplify anchoring to poles, walls, or trees.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustom Sizing:\u003c\/strong\u003e Multiple custom size options let buyers choose a sail to fit patios, carports, pool areas, or irregular venues when measured carefully.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStyling:\u003c\/strong\u003e The rectangle shape and blue color act as functional shade and a decorative element that can integrate with existing outdoor designs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe ShadeMart 21 ft x 21 ft sail is aimed at homeowners, renters with outdoor areas, and small-property managers who want a durable, UV-blocking canopy that breathes and resists water pooling. It is particularly suitable for covering boats, patios, yards and carports where attachments like poles, trees or walls are available.\u003c\/p\u003e\n\u003cp\u003ePeople who need a fully waterproof solution or who cannot anchor to nearby structures should look elsewhere; this style is explicitly not waterproof and depends on proper hardware and tensioning to perform best.\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-density polyethylene fabric offers long-lasting durability and resists fading in sun-exposed applications.\u003c\/li\u003e\n\u003cli\u003eBlocks a large portion of UV radiation, improving comfort and protecting surfaces beneath.\u003c\/li\u003e\n\u003cli\u003eWater permeable design prevents ponding and allows ventilation, reducing wind stress on the sail.\u003c\/li\u003e\n\u003cli\u003eStainless steel D rings and heavy webbing provide secure attachment points for typical hardware kits.\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 heavy rain fully out and is not suitable where a dry overhead cover is required.\u003c\/li\u003e\n\u003cli\u003eCustom sizing requires careful measurement; manual size variance is possible so buyers must measure accurately.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\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\u003eSquare \/ Rectangle style\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003e21 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 on 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\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe ShadeMart 21 ft x 21 ft Blue Sun Shade Sail is a solid value for anyone seeking durable, breathable sun protection with strong UV blocking. It performs well for patios, carports and boats when anchored correctly, offering a balance of airflow, color retention and hardware strength; choose another product only if you need a fully waterproof canopy.\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, not waterproof, so it allows water to pass through instead of forming a tight barrier.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat hardware is used at the corners?\u003c\/strong\u003e\u003cbr\u003eEach corner has a stainless steel D ring attached to heavy duty white webbing for secure anchoring with appropriate hardware kits.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan it reduce temperature under the canopy?\u003c\/strong\u003e\u003cbr\u003eYes, the UPF50 fabric blocks up to 95% of UV and typically lowers temperatures under the sail by about 10 to 15 degrees.\u003c\/p\u003e","brand":"ShadeMart","offers":[{"title":"Default Title","offer_id":48204761661659,"sku":"B0B5LYB8RW","price":206.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/91CyVuDkKhL._AC_SL1500_9c7886a0-d141-4cbb-8710-3e4d69dad20e.jpg?v=1770276323","url":"https:\/\/gearmusthave.com\/products\/shademart-21-ft-x-21-ft-blue-sun-shade-sail-upf50-square-breathable","provider":"GearMustHave","version":"1.0","type":"link"}