Why They're CoolRockered Vibram soles endorse an effortless, natural walking motion. Why don't more companies use 'em? » On a trek through Arizona's White Mountains, the shallow, omnidirectional lugs gave me solid traction over dirt and needles, and excellent grip on smooth rock. » The polyurethane midsole is a step up from EVA in durability and support, a fact made obvious after five or six hours on the trail. I wouldn't hesitate to wear these on a short backpacking trip. » Flat webbing eyelets through the instep and a pair of nylon eyes on top made for instant, one-yank lace tensioning. » A toe cap and wraparound rand protect the uppers where they are most vulnerable: up front.Hmmm . . .The polyurethane shank guards against trail stingers, but less effectively under a load.