Part hiking shoe, part sandal, the Zionic ADV takes the stable design of Keen's Zionic trail shoe and combines it with breathable mesh (and a few cut-outs) to create a prime slice of summer footwear. Those abrasion-resistant mesh uppers keep the weight down without sacrificing strength, while that inner sock-lining means they're particularly comfortable. If you like the feel of open-air sandals but need a bit of extra protection out on the trail, you're in the right place.