Men's Endorphin Azura PHG's the GTS 21 offers a

the GTS 21 offers a slightly softer and more responsive ride

especially for a shoe in the lightweight category

ground contact time and more to help improve your running form

While it retains ALTRA’s signature wide toe box

which some runners found to be a bit too soft for faster-paced runs

Men's Endorphin Azura PHG's the GTS 21 offers aDescription: With its bold design aesthetic, the Endorphin Azura introduces a non plated super foam experience to our Fast & Light category. Designed as a high performance daily trainer, the Endorphin Azura offers the perfect combination of a soft, bouncy ride for your daily miles, while delivering a responsive snap from the full PWRRUN PB midsole and SpeedRoll technology for when you pick up the pace. Features & Benefits SUPER FOAM: Relish the soft