On the liner tongue? A fair bit. Like a World Cup racing liner, you can position each tongue fore/aft to individually match up to your feet in the way that works for each.
These liners (along with any liner that uses a Velcro-fixation tongue) are also compatible with Atomic's V3 Tongue System where you can pick from 3 different tongue thicknesses to further perfect the fit over your instep and/or shin.
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