Bamboo Top Cover Our signature Bamboo top cover blends with natural Nano-Bamboo particles. The result is a comfortable natural anti-odor solution with high 'wicking' properties for superior comfort. Shock Layer This thin, light, shock absorbing "support" layer allows heat and moisture to easily move away from the foot with each step. Arch Plus Provides comfortable extra support for casual, everyday comfort. Fully molded anatomically shaped shock absorbing material. Removable foam "support pillar" provides additional soft arch support. Lightweight design is fully breathable while absorbing daily impacts.One-fourth of all of the bones of the human body are in our feet. When these bones are out of balance, the whole body is out of balance. So take a step toward a healthier body, beginning with your feet.