What Our Gearhead(R) Experts Are Saying: "This suit is my go-to for bundling up my little one on winter walks or cold camp mornings. The ThermoBall insulation really traps warmth, even if it gets damp, and I love how easy it is to get on and off thanks to the front zip."We want our tiniest explorers to experience the outdoors in comfort, and the Baby ThermoBall One-Piece makes that possible. Built by The North Face with warm, lightweight ThermoBall insulation and soft fleece lining, this one-piece helps babies stay cozy through chilly days whether they're in a carrier, stroller, or rolling around the tent.