the next step in kid-focused comfort. 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 customised fit and warmth of a heat-moldable imprint® liner to the weightless feel and cushioning of the dynolite outsole. add the easy entry/exit and mitt-friendly adjustability of the boa® closure 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. superior cushioning, improved board feel, and consistent support in a 20% lighter weight construction. the dynolite outsole is made entirely of an exclusive cushioning compound specially formulated to withstand repeated impacts and freezing temps for long lasting shock absorption.linerthe youth imprint® liner has integrated liner lacing and inner lace hooks to keep the feet in place no matter what. heat moldable with fit panels to ensure a perfect fit and completed with a level 1 eva foodbed 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 re-designed inner coiler spool to route the laces, the dial-it-in system retains its quick, easy, and effective lace adjustment.