The Wolverine anti-fatigue epx insole adds energy through every step. Epx combines a host of energy-dissipating features into one powerful footbed, ready to cushion your feet during the grind of today's demanding work environment. A high-density base layer distributes weight while a low-density layer of eva foam cushions the impact from heel to toe. A honeycomb pattern under each heel places special attention on the areas of highest force. AND the ribbed spine allows the footbed to flex and continue providing comfort no matter your body position. Your hardworking feet deserve the best technology, and that is exactly what this epx anti-fatigue insole provides.