Pre-wired for Therm-ic heat you can plug Burton's Supreme Heat snowboard boot in your car or SUV AC adaptor to warm up before you reach the mountains. Now you know why all those new SUV models come with multiple AC outlets around the front and back passenger seats (that's our theory and we're sticking with it). The Supreme Heat remains one of the most advanced and best equipped women's snowboard boots available for advanced and expert riders. It doesn't have the extreme stiffness of the all-terrain Women's Q boot but it has all the performance features that make it the prime choice of pro riders like Kelly Clark and Natasza Zurek. This season Burton enhanced the fit with a new Imprint 4 Liner with True Fit construction and a lighter EVA Outsole with special Dual Zone B3 gel cushioning. The new Imprint 4 Liner offers Power Panel 2.0 technology and has customizable refinements like the J-Bar adjustable heel hold system and the Outlast Adaptive Comfort technology. The Power Panels inside the new liner contain memory foam materials that snap back to their original positions far better than the traditional boot materials that typically "pack in" after a season of hard use. That Outlast technology in the liner is a thermal phase-changing material that helps absorb excess heat while you're hiking up backcountry ridges and releases the thermal warmth as your feet chill during long rides down the fall line. The result is a more consistent insulation performance that you can count on throughout the day--especially after you unplug the Supreme Heat from your AC outlets. Burton's True Fit construction is a female-specific design element that's found on all of their snowboard boots this season. Every part of the Imprint liner shell cuff heel counter tongue and even the lace guides are specifically designed to fit female feet. There are no unisex shortcuts on Burton women's snowboard boots. Ever. Other nice touches on the Supreme Heat include the Speed Zone Lacing System but the Supreme features a distinct streamlined version so you can cinch up the snowboard boot over certain areas where you need added support or a little more flex. This is done by pulling a Lower Zone lace handle until the boot is tight over the ankle area then adjusting the Upper Zone lace handle until the cuff region feels right. When you're ready to go tuck the handles into their neatly concealed pockets outside the liner and get into your bindings. Burton's Speed Zone lacing guides also micro adjust so you have even lace tension where you need it potentially reducing foot fatigue and eliminating those painful pressure points found on other women's snowboard boots. No matter what sort of riding style you have or what terrain you like to hit the Supreme Heat is a supreme pick for your future seasons. If you tend to ride on warmer winter days and don't need the Therm-ic wiring check out Burton's Women's Supreme.