The Brooks Glycerin GTS 23 delivers an ultra-plush yet powerfully responsive ride, giving every run a smooth and energized feel. The adaptive fit and GuideRails(TM) support system keep you comfortably aligned so you can stay focused on the miles ahead. Design: Engineered with plush, tuned cushioning for a soft yet responsive ride Built with an accommodating fit that adapts comfortably to various foot shapes Features structured support through the GuideRails(TM) Technology System to help keep excess movement in check without feeling intrusive In-Shoe Comfort: Featuring even more nitrogen-infused DNA TUNED foam, combining large cells in the heel for airy landings and small cells in the forefoot for electric toe-offs Durability & Traction: Durable outsole engineered for road-running reliability, offering grip that supports everyday and long-distance training Additional Details: Best for road running, everyday runs, and long runs Midsole drop: 8mm Weight: 11.0 oz / 311.8g 60.3 % Recycled materials in the upper