The best children's underwear on the market uses a clever 2-layer construction to keep young active ones dry and warm. Our LIFA® technology wicks moisture away while the soft merino wool creates breathable warmth. We've improved it with cool prints because basics can be fun too. This set features a regular fit, elastic waistband, flat seams for added comfort, a graphic print, and non-irritating fabric. Composition: Shell: 57% merino wool, 43% polypropylene.