US sizing. Lightweight, studded running shoes with great cushioning. Reliable Icebug Bugrip traction enables relaxed running even when it's slippery. The NewRun is designed especially for icy walkways and bike paths. - 17 carbon steel spikes on both sole - Membrane-free, with great breathability - Strong polyester fabric, made of 100% recycled fiber - Boa lacing: accurate, fast and reliable - OrthoLite Hybrid insoles - EVA midsole is slightly wider at the bottom, adding to the stability - Surface and liner fabrics as well as the insoles are Bluesign certified - Oeko-Tex 100 certified liner - TPU mud guard