The Right Snowsuit for Your Baby: Boiled Wool, Softshell, or Rain Suit?
Whether spring, fall, or winter, there are many full-body suits for babies. Which is right for which weather? We compare boiled-wool suits, softshell suits, and rain suits.
Written by Wetterbaby Editorial Team on September 29, 2025
Between boiled wool (felted wool, warm and water-repellent), softshell, and a rain suit, the range of full-body baby suits is wide, and the three types do quite different things. The wrong choice shows quickly: either your baby sweats, or they get cold.
Compared with two-piece outfits, a full-body suit has a clear advantage. Nothing slips up, nothing is left exposed, which matters for babies who spend a lot of time lying in the stroller and can't adjust their own clothing. Dressing gets simpler too, since the only remaining question is what to put underneath. The warm winter version is what most parents call a snowsuit (often listed as an “overall”); the waterproof version is a rain suit.
Boiled Wool: Warm for Fall and Winter
A boiled-wool suit is made of felted virgin wool. The material warms reliably without overheating, is breathable, and repels wind and light moisture. Its range is cold days without rain, from late fall into winter, ideal for babies who move little, whether in the stroller or the carrier. How much boiled wool a day calls for shifts with the wind and with how active your child is: a cold day in still air and a cold day with a stiff breeze are two different days. The main thing is not to overdress underneath: a bodysuit (onesie), a shirt, and possibly leggings are usually enough.
Softshell: For the Transitional Seasons
Softshell is light, windproof, and water-repellent, well suited to the windy, changeable days of spring and fall. It's more flexible than boiled wool and therefore the better choice for active babies who are already crawling or walking. It dries quickly and often comes with reflectors and a removable hood. For really cold days, though, softshell is too thin.
Rain Suit: Pure Moisture Protection
The classic rain suit of coated polyester or polyurethane keeps your baby dry: in the rain, in wet grass, on the playground after a shower. One point is often overlooked: rain suits are usually unlined. They don't provide warmth, only protection from wet. The warmth has to come from the layers underneath, from a bodysuit to a wool sweater depending on the temperature.
Quick Overview
| Weather conditions | Ideal for | Recommended suit |
|---|---|---|
| Cold & dry | Fall/Winter | Boiled-wool suit |
| Windy & mild | Spring/Fall | Softshell suit |
| Wet & cool | All year | Rain suit (with layers underneath) |
Underneath, the rule is simple: in mild weather a bodysuit, thin pants, and a shirt. In cool weather add a sweater and leggings or tights. In cold weather, wool clothing, mittens, and a hat. For the neck, skip the loose scarf, which can tighten or slip over the face, and use a balaclava-style hat or a snug neck warmer instead.
The Wetterbaby app tells you each day which suit and which layers underneath fit best, tailored degree by degree to temperature, precipitation, and wind.
