It lets you switch, even after the foe uses trapping moves like mean look.
The holder can switch out, even if under the effects of Ingrain, Arena Trap, Magnet Pull, Shadow Tag, Block, Mean Look, Spider Web, Bind, Clamp, Fire Spin, Magma Storm, Sand Tomb, Whirlpool, or Wrap. Pokemon that have used Ingrain and or have the ability Suction Cups are still not affected by Roar and Whirlwind. A Pokemon locked into Ice Ball, Outrage, Petal Dance, Rollout, Thrash, or Uproar will still not be able to switch out.
- From Smogon