Used one season, great condition. Perfect base layer for any season! One year size fit well between 9 months and 18 months. From their website: "We call them Pyjamas, but you can call then anything you like! Base layers, jammies, thermals, PJs... whatever they're up to, wherever they are, your kids will feel just right in their pure merino Wee Woollies. Designed with versatility in mind - layer them, sleep in them or split them up for everyday wear. Slim fit with flat lock seams for comfort and durability and a contrasting gusset for extra room and flexibility. Made from the perfect mid-weight merino for year round adventure. Absolutely no chemical flame retardants. Non-toxic Bluesign® approved dyes. 100% New Zealand ZQ Merino Wool (18.9 Micron, 195gsm). Designed and made in Canada."