The Nitro Dynasty BOA® Step On® is the ultimate all-mountain snowboard boot, combining the best of three worlds for a precise fit and convenient entry. With the legendary Nitro fit, easy Step On® system, and Dual BOA® Fit System, this boot is a powerhouse that's never been seen before! The Armored Spine, Flex Link Design, and Internal Ankle Support provide stability and support for confident riding all day long. The Women's Step On® Rubber Sole and Step On® EVA Midsole offer a secure grip for hiking and walking to the lift. And with the Cloud 9 Liner, Therminator Shield, and Ortholite® Triple Density Footbed, your feet will stay warm and cozy even on the coldest days. But what really ties this boot together is the patented Nitro Re/Lace Liner Locker, ensuring a perfect fit from first run to last.