Filled with lightweight, 100% recycled body insulation, the Baby ThermoBall™ One-Piece is the ideal all-in-one layer for their first winters. With an attached hood, fold-over mitts and booties, plus a water-repellent finish, they’ll have the coverage they need for new adventures in the outdoors. We’ve also updated our youth sizing. Please use our sizing guide to find your best fit. Non-PFC DWR finish for added water repellency Fleece-lined hood and upper body Fold-over mitts at sleeve cuffs and booties at leg cuffs