Turns out, I’m still not a runner Here’s all the information straight from their website: • 100% recycled breathable mesh upper, laces, and webbing • Cleansport NXT™ treated for natural odor control • Merrell Barefoot 2 construction is designed to keep the foot in a natural position • Vibram® Ecostep recycled outsole designed with 30% recycled rubber which provides added durability and improved grip on wet and dry surfaces