Bullet_point: ['Additional hidden instep fit adjustment for a precise, secure and comfortable fit.', 'Alpinestars exclusive thin rubber compound outsole, derived from Formula 1’s race program, delivers unsurpassed levels of feel and sensitivity with the pedals, while the textured pattern ensures optimum levels of grip.', 'Complies with SFI (SFI: 3.3/5) homologation standard.', 'Lightweight micro-porous padding around the heel and insole entrance for enhanced comfort while driving.', 'Main closure made by hook and loop for ease of use.', 'Main upper leather material made by patented one-piece design for a highly reduced material construction for greater comfort and performance in the cockpit.', 'Main upper material is constructed using superior bovine leather the optimum blend of superior mechanical resistance and driver comfort.', 'Micro-porous heel for additional shock absorbing and light weight.', 'Strategically-positioned perforation zones on the lateral and medial sides and the front toe for collar for optimized ventilation, breathability and comfort.', 'The elastic fireproof collar and tongue combines lightweight technology and unsurpassed levels of comfort, for enhanced general performance and an optimized fit.'] (Page 1)