About This 100% Merino Wool Lining / 100% Organic Cotton Outer Imported PREMIUM FABRICS FOR BEST COMFORT: Australian merino wool lining - 100% natural, luxuriously soft, and temperature regulating. GOTS certified organic cotton outer. Machine-washable. Universal size: 2-4 years. Exceptionally breathable merino wool lining regulates body temperature so it can be used in all 4 seasons (suggested dressing guide included). See also Woolino 2-24 months Sack. CONVENIENT DESIGN: Both shoulder snaps and two-way side zipper for easy dressing; Closable seat-belt slots for easy transfer from stroller or bouncer to crib. Under-arm snaps allow this wearable blanket to grow with your child. PREMIUM QUALITY PRODUCT, backed by an industry-leading Warranty from a US company with US customer service. The best gift for toddlers. Help parents reduce or eliminate sleepless nights.