Raise the bar on the slopes with the ultimate zonal fit control of the Burton Ion Boa 19 boot! Dual Zone Focus Boa Coiler Closure System is powered by Burtons exclusive New England ropes. 1:1 firm flex PowerUP tongue. Comfort: Total Comfort Construction Outer shell pressure relief panel Snow-proof internal gusset Aegis antimicrobial coating Liner: Life Liner DRYRIDE Heat Cycle lining Ultralon Performance Foam Tuff Cuff Cushioning: AutoCANT cushioning ReBounce cushioning Sleeping Bag Reflective Foil ESS Support Shank Level 2 molded EVA footbed. Outsole: Low-profile EST optimized midsole Outsole rubber contains recycled content Shrinkage footprint reduction technology Imported. Measurements: Weight: 2 lbs 11 oz Shaft: 10 in Product measurements were taken using size 11, width D - Medium. Please note that measurements may vary by size.