Janus Merino Wool Baby Toddler Anti-Slip Tights. 75% Merino wool, 23% Polyamide 2% Elastane. The little grips on the knees and feet of these tights are a great feature for little ones who are learning to crawl, walk and run. Made from soft, non-itch merino wool, kind to the skin and keep your baby comfortably warm. Janus baby wool collection is perfect for both summer and winter. Easy to wash in the machine (85 F degrees) and can be tumble dried at a low heat. Janus wool has the capacity to absorb up to 30% of its own weight in moisture, without feeling wet. Merino wool has a high air content and therefore a high capacity for regulating body temperature. Size 0-1 Years, for height 60-70 cm (24-27.5 inches); 1-2 Years, for height 80-90 cm (31.5-35.5 inches); size 3-4 Years for height 100-110 cm (40-43 inches).