Duckies are made with a cool knit that hugs the foot for comfort and keeps their little toes breezy. Highly flexible and lightweight, they are perfect for first-time walkers to playground runners. Throw them in your machine on a cool cycle, ready to enjoy again with a quick dry! Materials UPPER: 90% polyester / 10% spandexSOLE: 100% TPE RubberINNER SOLE: PU Ortho-foam with knitted polyester upper.- Soft and breathable mesh upper- Non-slip rubber sole- Removal internal sole Product Care- • Machine washable on COLD setting• Dry outside• Do not tumble dry Size 3 (6-9 months): 10-11cm Foot length Size 4 (9-14 months): 11-12cm Foot length Size 5 (14-20 months) 12-13cm Foot length Size 6 (20 months+) 13-14cm Foot length Size 7 (3 years+) 14-15cm Foot length Please note: Our size guide is simply a guide to assist you in selecting the best possible fit for your little one. Our guide is a suggestion only and not a fit guarantee.