Power Tuff insoles are built for comfort and support. The molded shell gives better support. The deeper heel cup anchors your foot. The EVA base absorbs heel shock. The top fabric is anti-bacterial, anti-microbial and breathable to fight sweaty, stinky feet. These insoles are static dissipating to help protect against the hazards of static buildup in the workplace or other sensitive electronic environments. Flexible molded shell has deep heel cup design for better fit, support and stability. EVA base construction is lightweight and durable. Insole footbed has “rebound” to energize your step and reduce fatigue. High-tech fabric lets insoles “breath” for better foot health.