Keeps your toes and feet warm. Very good lining. Muck Boot's basic properties: Extra insulation, double insulated floor Shock absorbing with a perfect grip 100% waterproof Durable Floating A reinforced rubber to provide additional support A reinforced rubber in the toe section to give additional protection Note! The shoe's EUR equivalents are updated. To be sure, check the size chart in centimeters and the corresponding US size. EUR size in the shoe itself can variate. Note! The product design is firm so choose one size bigger boot than you would normally wear.