Brooks Adrenaline GTS 13 Shoes Lucky 13 is our best Adrenaline GTS yet. We paid special attention to the underfoot flex by adding Omega Flex Grooves & continuing Omni Grooves in the forefoot, allowing the outsole to bend & shape naturally. Continuing with the tradition of a tailored fit, stretch eyelets lock into the medial side to capture the foot better & technologies like Flextra & anatomical Brooks DNA deliver customized stability & cushion. We&8217;re not the only Adrenaline junkies out there &8211; Runner&8217;s World named the GTS 13 Editor&8217;s Choice in the Fall Shoe Guide in their December 2012 issue. They call the GTS 13 a &8220;classic stability shoe”, "ed one wear tester as saying, &8220;it&8217;s soft enough that you can feel the road surface below, but there&8217;s enough padding that you don&8217;t feel as though youre running on concrete blocks.” No luck here, just purely good design. Brooks Adrenaline GTS 13 Shoes Features