The Adrenaline GTS 20 continues to cater to the industry's trends towards softer shoes and non-traditional methods of reducing overpronation. Compared to Adrenalines of the past, the ride is softer, springier, and a new guide rail system helps to protect your knees by reducing excess foot movement.
To create a softer ride, designers blended air and rubber to the foam in the heel. The air makes it softer and lighter while the rubber makes it bouncier. Additionally, guide rails on both sides of the heel work like bumpers on a bowling alley. As your foot attempts to move from side to side the bumpers guide your foot back to a towards the middle of the shoe where your stride is most efficient.