The layer of all layers. I love this vest because it's an easy layer to get on a squirming baby and it allows her to move her arms to get to a teething ring or toy, but also keeps her warm. Fabric: 100% recycled polyester ripstop shell that's windproof and water-repellent, with 100% recycled polyester filling. Machine washable (recommended with zipper fully closed). Feel: Smooth and lightweight; just-right for cool weather and easy to layer in brisker temps. Learn more. Fit: Layer-friendly, hits at hips. Features outside pockets, plus an inner ID label. Super soft and made to wash and wear better than anything else in their closet.