From OOFOS Men's, the OOmg LS Sport Low Sneakers feature: 4-way stretch FibreFlex, synthetic upper Lightweight, flexible construction The OOmg Sport LS is an Active Recovery shoe built for a highly active day Synthetic lining OOfoam™ technology and patented footbed geometry integrated Lacing System for adjustable heel and midfoot lock, as well as lateral stability, while still providing maximum forefoot mobility in an athletic, closed-toe silhouette midsole of tapered sidewall Synthetic outsole Imported.