If your feet could design an insole, the Danner DXT Comfort insole would be it. Its TPU X design support stabilizer cup and extra heel shock absorber protect your feet from slippage and jarring. A layer of slow-rebound memory foam conforms to your foot's shape every time you step in. The X-Static lining keeps your feet fungal free and cool for all day comfort. Treat your feet to DXT Comfort . FeaturesIncorporates a dual-density shock absorption systemHeel uses a tri-density system to reduce knee stressMolded TPU cup for added arch supportQuick-dry microfiber top cloth