Attipas the originals with the best design and quality now in the US market! Attipas is the perfect shoe to use from the crawling stage, during firts steeps and all the way to 3-4 years old. Kids fall in love with Attipas! Used my babies, infants and toddlers! It's cute, trendy and super light, flexible and feels like walking bare foot. Attipas design is the result of years of research at Seul University, that prove that barefoot walking is the best for brain developing, steddy and stable walking learning process. Attipas is the parent choice for a safe, non toxic shoe. It has a "toe box", tha allows free movement of toes and helps with balance. Anti slip sole! Materials: Sock, blending fiber: Cotton 80%, spandex 17%, rubber yarn 2%, polyurethane yarn 1%. Outsole: TPR 100% (Tested non-toxic products). Care: Washing Machine Washable (hand wash recommended). Do not bleach. Air dry recommended ATTIPAS Functional: suitable both for indoor and outdoor activity Breathable: perforated sole releases heat and moisture for added comfort Convenient: durable, non-slip sole, machine washable, fast drying Large toe box: free toe movement for improved cognitive & motor development Safe: all shoes are made of non-toxic and safety tested materials Lightweight & flexible: super lightweight, just like wearing socks Secure: will securely keep on child's feet Size Guide: Small US 3.5 / EU 19 Medium US 4.5 / EU 20 Large US 5.5 / EU 21.5 XLarge US 6.6 / EU 22.5 XXL US 7.5 / EU 24 XXXL US 8.5 / EU 25.5