Drawing on decades of R&D experience at the highest levels of motorsports, Alpinestars incorporates cutting-edge performance innovations into the Stella Faster 4 shoes. The shoes' seamless knitted construction ensures exceptional lightness and breathability, while delivering class-leading protection both inside and out. Medial dual-density ankle protectors positioned between the upper and padded lining and thermoplastic rubber (TPR) on the later calf, slider, toe box and heel counter provide optimal protection and comfort. The Stella Faster 4 shoes are as flexible as they are protective thanks to a back flexion point constructed from soft microfiber, soft rear collar construction and heel-dampening midsole with integrated shank.