Superbly insulated and cushioned for snow play and walks to the school bus stop Sorel Cub Snow Boots combine a waterproof injection-molded thermal rubber shell with tough water-resistant nylon and back everything with a removable and washable felt InnerBoot rated down to -25F (-32C). Because the InnerBoot insulation is replaceable Sorel's durably designed Cub Snow Boots often find a second and third life as family hand-me-downs--which adds up to significant value you can count on season after season.