From OOFOS®, the Men's OOriginal Thong Sandals feature: Synthetic upper with moisture and odor resistant materials Designed to soothe and reinvigorate feet after a tough workout Closed-cell foam is machine washable and designed to minimize odor Soft, contouring toe post reduces the likelihood of chafing Proprietary footbed design reduces stress on knees, ankles and other joints OOfoam™ footbed cushioning technology absorbs impact, cradles the arch, and promotes natural foot movement Imported.