Burton Toaster Snow Boot Liner Neoprene Imported COMFORT - Heat-Moldable, Aegis Antimicrobial Coating - Inhibits foul odors. Your feet [and your friends] will thank us. Look for Aegis on select liners and footbeds. LINER - Three Temperature Settings with Built-In Control, Removable Lithium Ion Battery with Micro USB Recharging Cable Included, Compatible with any Burton Boot Featuring an Inner Cuff Built Into the Shell, Velcro Liner Closure, DRYRIDE Heat Cycle Lining - Warmth and wicking are two key traits for on-snow comfort. Our breathable inner-lining technology utilizes interwoven thermally activated carbon thread to capture, radiate, and reflect body heat inward to keep feet. CUSHIONING - ESS Support Shank - The added support reduces fatigue while preventing your arch from collapsing on itself when you bomb drop a 40-footer. FOOTBED - Level 2 Molded EVA Footbed - Lightweight and long-lasting shock absorption.