Alpinestars Tech 10 Supervented Boot YCRF_rain_gear With special breathable 3d mesh Includes resettable trip as With special breathable 3d mesh Look closely and you'll notice these boots employ the BOA Fit System with M4 dial at the laces combined with a dual front blade system and shock absorber insert to offer mechanical progressive force release to dampen and absorb impact energies and a re designed dual density TPU rear blade system is engineered to prevent hyper extension while offering improved flex control and impact resistance New performance double pivot motion control system features: a medial and lateral double pivot system for improved levels of flexibility and precision control