These are Burton Sapphire boots in size 4ampnbspampnbspampnbspBurton Sapphire Snowboard Boots - Womenamp39s ampndash Whether smoking the competition or lighting it up in front of the lens Natasza Zurek packs the Sapphire Boots With a smooth flex skate-shoe comfort and a new oversized and ultra-light cushioning system one rip of this gem will go straight to your head For those mid-winter marathons take advantage of the Burton Sapphire Snowboard Boots with Therm-ic pre-wired Flex 2 liner which provides buttery mobility in a heat-ready packageampnbspampnbspTECH SPECSFlex Rating and Fit Flex 4 1 Soft ampndash 10 Stiff The Burton Sapphire Snowboard Boots are a softer boot perfect for buttery park runs late-night street sessions and riders who donamprsquot want to be restricted by a stiff bootConstruction The Articulating Cuff creates a fluid forward flex by allowing the upper and lower cuff of the boot to flex independently thus minimizing shell distortion and maximizing heel hold and responseThin Profile 3D Molded Tongue - Adjusting the profile of the tongueamprsquos thickness controls its flex enhances its ability to wrap the forefoot and reduces shellliner stack-up for improved comfortLiner and LacingWhether you have funky cankles or a grotesque sixth toe rest assured that your feet will be wrapped with comfort in Burtonamprsquos Flex liner While they fit great out of the box you can even custom mold these babies to the shape of your foot with Burtonamprsquos EMU heat-molding system found at your local shopFlex Spine Backstay to flex laterally for maximum mobility while providing ample edge-to-edge support when itamprsquos time to throw down the landing gearLacing 21 Power Lacing is fast and efficientampnbsp