The new S/PRO Supra BOA® boots for men and women combine the fit and performance features that were refined for the award-winning S/PRO Alpha boot such as 3D Instep Shell, Custom Tongue and Custom Shell HD, a new EXOWRAP™ construction, and the category leading 100mm last. The result? Best in class fit, customization and performance in a boot laser focused on the largest, and most popular, boot last in the industry.