Brooks ADRENALINE GTS 21 RUN WILD Running active Sneakers Womens Size 10 Pre-owned, see pictures for wear Black and green animal print Brooks legendary support shoe is now even softer! The Brooks Adrenaline GTS 21 features an extended DNA LOFT from the heel to forefoot for a buttery smooth stride. The GuideRails® on both sides of the heel continue to work like bumpers on a bowling alley that keeps your foot towards the middle of the shoe where your stride is most efficient.