Never lose another sock. Featuring our two-part adjustable closure system that remains secure on your baby's feet and grows with them. Intentionally designed, organic cotton bamboo thermal fabric keeps your babe cozy, while also giving them the freedom to play. 6m has extra grip on soles for those first wobbly (and adorable) steps. Fabric: 67% viscose from bamboo, 28% organic cotton, 5% elastane Care: Machine wash on low or delicate. Dry on gentle/low or line dry.