MAUI Men's Earthing Shoes: Flip Flops for grounding yourself on city sidewalks or sandy beaches. Matching wide woven straps with a comfortably smooth finish. Cushy rubber soles with built-in arch support feature pluggz shoes grounding technology for grounding energy. AVOID COCONUT OIL, WHICH DISINTEGRATES RUBBER AND PLASTIC. ORDER TRUE SIZE. HALF SIZES GO UP.