Adidas’ 3D-printed sneaker review: What are those!?

A shoe engineered to be made entirely from additive manufacturing will be polarizing in the first quarter of the 21st century. That's certainly been my experience wearing Adidas' new 3D-printed Climacool sneakers on the beach, trail, or in the city. I felt more eyes on my footwear than normal, with a determined flick upward to see who was brave enough, dumb enough, or fantastic enough to wear such a shoe.

I've been a fan of Adidas' 3D-printed kicks ever since I purchased a pair of its 4D running shoes a few years ago. But those are traditional multi-material sneakers with 3D printing limited to the midsoles. Adidas is taking things to the next level with Climacool - a single-piece shoe that's 100 percent 3D printed. They were teased late last year with a limited drop, but now anyone can buy them.

The rubbery lattice structure varies in density from the sole (where it's high) to the upper (low) to provide the right balance of cushion and flex. Adidas calls the shoe lightweight, but at 416 grams, it's heavier and more rigid than I expected from the photos and marketing pitch. It can be folded in half, toe to heel, but these are not the shoes I'd pack for recovery after a long hike o …

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