Alpinestars Women's Stella SMX-1 R Vented Boots (42) (BLACK/GOLD) Durable, lightweight and incorporating extensive perforation the low cut road riding boot, the Stella SMX-1 R Vented is constructed from a highly abrasion-resistant microfiber upper and is reinforced with strategically positioned TPU protectors. Alpinestars' exclusive rubber compound sole offers comfort and excellent grip, both on and off the bike, while the accordion flex zones give support and control regardless of your riding position. Optimally designed, developed, and performance fitted for women. Main upper constructed from an advanced microfiber for comfort, durability and excellent abrasion resistance. Perforated medial, lateral and toe panels for superb ventilation.