? Nitro Step On Outsole ? Step On compatibility with up to 30% recycled rubber ? EVA Midsole ? Comfort and thermal insulation ? Therminator Shield ? Sole insulation ? Armored Spine ? Long-lasting heel fit ? Ankle Strap with BOA Fit System ? Micro-adjustable precision fit ? Power Tongue Stiffener ? Adjustable boot response ? ILS (Internal Lacing System) ? Securing liner in the shell for zero heel slip