Bogs Classic Mumsie for kids are comfort rated to withstand sub-zero temps (up to -30°F). The new whimsical Bogs Classic Mumsie is waterproof and ready for anything Mother Nature may bring. Crafted from high quality, natural rubber for maximum durability, these boots will last for years. Insulated with 7mm of our waterproof Neo-Tech and lined with NEW Max-Wick moisture-wicking technology. Easy pull-on handles are kid-tested and approved.