The Glycerin GTS 21 features:

The Brooks Glycerin GTS 21 provides you with miles and miles of softness and stability. This plush shoe is optimized for your comfort by being lightweight, responsive, durable and cushioned. Whether you are on your feet all day for work, enjoying a daily walk or training for a marathon, the Brooks Glycerin GTS 21 gives you a stable and plush experience.

Brooks uses its GuideRail technology to support your body in its natural motion path while keeping excess motion in check, ideal for those with flexible arches or who overpronate and like a bit of extra stability.