New Balance Men's MTCRGLG1 Trail Runner Rosin/Green/Black Leading-edge trail technology is paired with a softer and lighter version of the Fresh Foam technology to give you both speed and traction. 8 mm drop: due to variances created during the development and manufacturing processes, all references to 8 mm drop are approximate. Bootie construction for a custom like fit. Fresh Foam innovative midsole created from a single piece of foam that provides a plush, more natural ride. Synthetic/mesh upper. Great tread on bottom still! Notice how back flips up to create a sock-like fit around foot.