Brooks Women's Glycerin GTS 21 Black\/White 120409-090 Lace up and head out in supreme comfort. For the men's Glycerin GTS 21, we added 2mm more super soft DNA LOFT v3 cushioning for extra plushness, while our innovative GuideRails support system keeps you comfortably in stride. Plus an updated, streamlined upper adds breathability. Sustainability: 61.1% Recycled materials in the upper \/ 3.75 Plastic bottles diverted from landfills Best For: Supreme softness, comfortable fit Support: Road running Designed for: Road Running These provide comfort for people who suffer from bunions, plantar fasciitis, metatarsalgia, heel spurs, or other types of foot pain, such as heel, arch, ball of foot, knee or back pain. View More Colors | Shop all Brooks Brooks Women's Glycerin GTS 21 Black/White