Amazon offers Prime members the Coolaroo Party Sail Shade Canopy in Green, Orange, or Yellow for $24 with free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise shipping costs $7.24.) That's $12 under our March mention and the lowest total price we've seen. (It's also a current price low by $5.) It purports to block up to 90% of UV rays and features mold- and mildew-resistant fabric, grommet corners, and snare lines.