All the standard MUCK BOOT features plus:

• Stretch-fit topline binding snugs calf to keep warmth in and cold out
• Multi-ribbed tread-designed outsole
• 4mm flex-foam bootie with four-way stretch nylon, 100% waterproof, lightweight
  and flexible
• 1.25mm semi-rigid rubber reinforcement in the toe, heel, achilles and shank areas