The Adrenlaine GTS 20 has returned with a lighter mostly mesh upper and is still Brook's 'go-to-shoe' . Ideal for a runner who is after medium support, the updated GuideRail technology delivers the same support in a more confortable shoe.DNA LoftBioMoGo DNAEngineered mesh upperBlown rubber outsoleGuideRail technologyShoes Feet Gear - Paddington