Nordica Sportmachine 3 100 BOA Men’s Ski Boots. Sportmachine 3 100 BOA® allows you to explore the entire mountain in comfort without sacrificing performance. Its integrated BOA®Fit System perfectly pairs with Nordica’s Tri Force technology, enhancing its performance, precision and comfort. To keep you warm and dry run after run, it features a Precision Fit liner with PrimaLoft insulation. And thanks to a customizable shell and liner, you can truly make this boot your own. Ski your best turns yet with the Sportmachine 3 100 BOA®. Tri Force + BOA® Fit System. BOA® Fit System provides a performance fit engineered to enhance feel and responsiveness while reducing pressure points. 3D Precision Fit Liner. Closure Type : Strap, Buckle, BOA. Best Use : All Mountain Skiing. Features : Waterproof, Insulated, Breathable. # of Buckles : 2.