Designed and constructed specifically for a women's performance fit, Alpinestars Lace-Lock system constructed from an advanced polymer resin to provide quick, precise and secure closure, Front flex area is constructed with a soft microfiber for improved abrasion resistance and natural forward and back movement, Flexible accordion microfiber on Achilles gives enhanced natural movement, Strategically positioned ventilation area in heel and shin TPU for breathability and airflow, Outside entry/exit has stretchable accordion panel for a close fit and ease of entry and removal, Contoured high modulus shin plate protector gives superior impact and abrasion resistance, Dual density TPU replaceable toe slider with screw-in assembly providing protective coverage around the outer toe area, TPU heel protector is strategically positioned to dissipate and absorb shocks and promote sliding during an accident, Large front and rear accordion zones are optimized to maximize flexibility for maximum comfort and improved safety, Lateral micro adjustable ratchet top closure stows tab end, Alpinestars anatomical and replaceable countered EVA footbed provides arch support and forefoot pedal feeling, Durable sole, designed for improved riding feel, features evenly textured rubber for consistent grip, Inner instep speed lacing closure and unique lateral zipper offer precise and secure fit, Hook and loop tap locks the zip pull close, keeping in flat and safe, Advanced microfiber upper construction for lightweight high performance protection and superb levels of flexibility, New Alpinestars unique Multi-Link Control system provides advanced external protection and support for ankle articulation, limiting hyper-torsion, hyper-extension and hyper-flexion as well as providing Achilles and ankle impact protection