Charged up with light, swift energy, these women's Boost Uncaged trainers from adidas take your running sessions next level. Built with a Primeknit upper that fits the foot like a sock, it's snug, supportive and stretchy enough to meet the demands of your run. Boost technology and a Stretchweb outsole combine to harness and unleash the foot's energy with every step, while the classic TORSION system and a Fitframe 3D TPU heel keep you supported every minute and every mile.. Material: Textile Upper/Synthetic Sole