We made the Baby Puff Mitts to keep baby's hands warm in all manner of snow play. The mittens are made from wind- and water-resistant 100% polyester shell fabric treated with a DWR (durable water repellent) finish to shed moisture. To keep small hands extra toasty, there's 100-g (60-g in the cuffs) THERMOLITE ECO92 100% polyester (92% recycled) insulation and an ultrasoft lining wicks moisture and dries quickly. Elasticized cuffs seal out the cold. Thumb compartments on all sizes.