Plush Cushioning + Structured SupportThe Glycerin GTS 23 delivers the same premium softness as the neutral Glycerin 23, with added GuideRails™ technology for runners who need a little extra stability. It's plush without being mushy, supportive without feeling restrictive.Soft Landings, Responsive Toe-OffsBrooks' nitrogen-infused DNA TUNED midsole features larger cells in the heel for cushioned impact and smaller, denser cells in the forefoot for a springy push-off. Version 23 adds 2mm more forefoot foam for an even more balanced, comfortable ride through long miles.GuideRails™ SupportRather than forcing your foot into a position, GuideRails work by keeping excess motion in check—only stepping in when your stride drifts off course. The result is natural-feeling support that adapts to your gait, helping you stay efficient without overcontrolling.Accommodating FitA new triple-jacquard engineered knit upper wraps the foot securely while staying breathable and soft. Available in Medium, Wide, and Extra Wide.The DetailsFit: True to sizeWeight: 9.8 oz (Women's)Drop: 8mmMidsole: DNA TUNED (nitrogen-infused)Support: GuideRails™ TechnologyUpper: 60% recycled content