This runner favorite is back with a better than ever midsole that provides a perfect balance of support and softness for all your miles. Breathable air mesh upper with 3D Fit Print for an enhanced structure Supportive GuideRails technology offers smoother transitions and helps keep you in your natural stride 12mm midsole drop New midsole with softer and lighter DNA LOFT v2 cushioning Partially made with recycled materials Brooks Women's Adrenaline GTS 23