Super by name, super by nature with a 9 mm thick removable felt liner (sock shaped) on top of the 2.5 mm felt frost plug in the sole. This boot is both tough and waterproof like every Superhero should be. The sturdy tread provides great traction for the winter conditions like jumping in piles of snow! Features Pull on boot with adjustable bungee straps at ankle Bungee drawcord at top to keep snow out. 

Fabric:

• Outer:Waterproof PU backed synthetic textile upper
• Insulation:Removable 9mm washable thermo plus felt Inner
• Midsole:2.5mm bonded felt frost plug 
• Outer Sole: Traction enhancing multi-directional lug
• Waterproof and thermal rubber shell 

Features:

• Seam Sealed Waterproof Construction to make sure little feet are kept warm and dry
• Taped seams on upper to make sure that no dampness gets in
• Elasticated laces with toggle fastening that makes them easy peasy for kids to fasten themselves
• Removable inner felt insulated lining that makes them easy to pop out and air but also helps you to check that the size is right when trying them at home! 
• Grippy soles to help prevent slips on snow and ice
• Sorel rated to -40C