The Reima Rapakko Rain Overall combines a fully waterproof build, with welded seams and a fabric rated for a water column over 10,000mm, with light insulation calibrated for cold rain, sleet, and slush rather than deep winter cold. That balance keeps a kid warm without overheating in the temperature range it's built for, roughly 5degC down to -10degC, or 40degF to 15degF. The one-piece construction means no separate jacket and pants to coordinate, with a front zipper and elastic leg ends that make getting dressed and undressed simple. What Our Gearhead(R) Experts Are Saying:"My kid jumped through every puddle on a cold, sleety walk and stayed warm without ever overheating under the suit. It's exactly the right amount of insulation for a day like that, not the deep-winter warmth you'd want for actual snow."