Imagine a deep forest. Every blade of grass, flower, bush or tree has a different shape and role. Yet they all thrive on a gradient of sunlight that filters through the canopy.

The Ktaxon 10-by-20-Foot Canopy Tent is on sale at Walmart for 41% off, and shoppers say it's "versatile" and a "must-have" for outdoor events. Shoppers say it has "impressive durability and design." ...