the step on® snowboard boot for the next generation. the burton zipline boa is a kid-tested, parent-approved winner for maximum fun and fuss-free function, with a softer flex and all-around easy boa® closure. with the same performance and features like in the adult boots to get kids ahead, from the customized fit and warmth of a heat-mouldable imprintâ„¢ liner to the weightless feel and heat-reflecting sleeping bag-foil. add the easy entry/exit and mitt-friendly adjustability of the boa® closure system, as well as the easy-to-use burton step on® system, and you get a boot that kids want to wear all day.outer boota soft flexing outsole and upper shell materials ensure fast learning. all burton boot tongues feature a snow-proof internal gusset construction to completely seal the lower zone of the boot, keeping feet warm and dry. the step on® backstay is optimized for burton's step on® system and is snugging up the fit between boot and highback. the rubber print backstays also shave weight and enhance material-to-material grip. the result of this printed rubber application is a more direct transfer from boot to binding to board for reduced rider fatigue.est® goes beyond bindings by optimizing the soles on select boots for a more direct connection. lower-profile, lighter weight, and with a reduced ramp angle, the step on® est® outsole lowers your center of gravity and improves your feel. linerthe youth imprintâ„¢ liner has integrated liner lacing and inner lace hooks to keep the feet in place no matter what. heat mouldable with fit panels to ensure a perfect fit and completed with a level 1 eva footbed for additional support and vibration absorption.lacing systemall burton boots with boa® have the virtually indestructible, warrantied for life performance of burton-exclusive new england rope laces. built with a redesigned inner coiler spool to route the laces, the dial-it-in system retains its quick, easy, and effective lace adjustment.important sizing informationmatch up your bindings and boots. step on®? bindings are only compatible with step on®? boots. do not use either product with non-step on®? boots or non-step on®? bindings.double-check the sizing chart to ensure that you have the right size binding for your boot size. pairing incompatible size boots and bindings will result in malfunction and could compromise your safety. also, men's and women's sizes are gender-specific for a reason. combining men's and women's step onâ„¢ products will result in malfunction and could compromise your safety.