Brooks Women's Glycerin 13 Running Shoe Mesh Imported Rubber sole 3D Fit Print Technology - Provides a seamless upper for streamlined support. Element Mesh and Lining - Provides key breathablity to the foot. Dynamic Saddle - Wraps the foot in a secure and comfortable fit. DNA Midsole - Adapts to your specific weight, pace, gait and running surface offering a customised cushioning and spring to your step. BioMoGo - Includes an organic, non-toxic additive that biodegrades the midsole 50 times faster than traditional EVA when it comes into contact with anaerobic landfill microbes.