Columbia kids winter thermal boots with removable insulation size 7 toddler With its washable and recycled felt liner, these boots will keep your child warm, dry, and protected from the elements. Omni-Tech™ waterproof breathable seam-sealed membrane bootie constructionWaterproof synthetic leather and nylon textile.Waterproof seam-sealed constructionRecycled 6mm washable recycled felt linerAdjustable hook and loop closure strapOne-piece injection molded TPR shell / outsole