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If you have ever tried to slack-line, you will know how tough it is to stay in place. Virtually impossible if you dont have good strength and balance. But have a helping hand – a shoulder to lean on when you’re teetering on the edge of falling – and it becomes a lot easier, and a lot safer too! Thats what the Adrenaline GTS 21 is, a helping hand to those in need of some guidance when running, but only when you need it. The GuideRails® technology is only noticeable when your form starts to collapse and then acts to help correct you, and keep you running strong. Extended DNA loft in the midsole keeps it a plush ride so even on the longer runs you’ll be running with good form and in good comfort.


Extended DNA Loft midsole through to the forefoot from the heel for a buttery, smooth ride.
BioMoGo foam on the medial side for a firm and responsive performance feel
Omega Flex Grooves enhance midsole flexibility with updated geometries on the lateral side offering improved cushioning.
Flextra varies the degree of support providing tuned flexibility.


HPR Plus is a high abrasion-resistant rubber for long lasting, durable traction
Blown Rubber in the forefoot offers durability, responsiveness and flexibility
Stable Pod Configuration is a stable midsole/outsole design that sets the foot up for an efficient, balanced heel-to-toe transition
Omni Grooves works with Omega Flex Grooves to enhance midsole flexibility without compromising cushioning


Engineered Air Mesh upper hugs the foot for a secure fit while also improving breathability
The 3D Fit Print applies strategic stretch and structure to the upper

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