* Excellent * Cotton * All Season * Blue This Petit Bateau Boys Onesie is a size 12 Months.  The Onesie is pre-owned in Excellent condition.  Typically Petit Bateau Blue Onesie would be worn for All Season.   Our products are sourced directly from Swoondle Society members and partner brands. Swoondle screens, values, photographs all products listed so you know exactly what to expect. Only members can trade items, but you don't need to be a member to shop.  Swoondle.com is a mom-founded start-up that provides parents an easy and sustainable way to buy and/or trade kid’s clothes online.