Brooks Glycerin 23 Running Shoes Designed for triathletes who demand ultimate comfort and performance in training and on race day, the Brooks Glycerin 23 Running Shoes take cushioning and fit to the next level. Featuring DNA-Tuned, nitrogen-infused cushioning with an extra 2mm in the forefoot, this shoe delivers a luxuriously soft yet responsive ride, perfect for recovery runs, long training sessions, or race-day transitions. Its neutral design supports a natural stride, while every element is fine-tuned to give you that smooth, floaty feeling mile after mile. Plush Comfort Meets Reliable Performance The Glycerin 23 features an enhanced triple-jacquard warp knit upper, offering a plush, adaptive fit that moves naturally with your foot while keeping it cool and supported. A flat-knit collar with a pull tab and speedlacing system makes transitions fast and easy, ideal for triathletes on the move. Underfoot, the durable RoadTack rubber outsole provides confident traction on wet or dry surfaces, while the ultra-soft cushioning ensures maximum comfort and energy return with every stride.