The HG1390S heel grounder is constructed from durable materials and features a classic hi-visibility yellow/green hook & loop closure with an elastic insert to maximize fit and comfort. Heel grounders connect the person wearing them to ground via a proper floor mat or flooring material. Wearing the conductive ribbon inside the shoe or sock assures proper electrical contact with the user. A buried 1 meg ohm resistor is standard. Heel grounders are worn on both feet to provide consistent grounding while in motion. Meets or exceeds requirements of ANSI ESD-S20.20.