The Rossignol BC 5 FW ski boot pairs a wide Rottefella NNN BC sole with a rotation axle for stability on narrow to mid-width touring skis across varied snow. Rossignol's Mobile Cuff hinges at the ankle to open up fore and aft range of motion while still locking in the torsional support needed to steer through off-trail terrain. What Our Gearhead(R) Experts Are Saying:"This boot's insulation held enough heat that I skipped the extra sock layer I usually pack for cold starts. The liner packed to the shape of my foot within a few tours, so hot spots and pressure points stopped happening on long days out."