Thermaswim Baby & Toddler Suits
Designed for babies and toddlers who need extra warmth in the water, our Thermaswim Baby & Toddler Thermal Swimsuits are made from soft, stretchy fabric with a brushed fleece lining. These full-coverage thermal swimsuits are ideal for children who feel the cold during swim lessons and family pool time.
Fleece-Lined Thermal Swimwear for Babies & Toddlers
Designed to fit comfortably close to the body, the Thermaswim helps retain your child’s natural body heat, while the soft fleece lining provides extra warmth and feels cozy against delicate skin. Full-length sleeves and legs provide maximum coverage, making it a great choice for cooler pools and longer swimming sessions.
The lightweight, stretchy fabric allows babies and toddlers to kick, splash, and move freely in the water, while a full-length zipper makes dressing and changing easier, even when the suit is wet.
Versatile enough for use in and out of the water, the Thermaswim can also be worn as a lightweight thermal base layer under clothing on cooler days.
Thermaswim does not include a built-in swim diaper. For reliable fecal leak protection in the pool, we recommend wearing a Happy Nappy™ or Happy Nappy Duo™ reusable swim diaper underneath.
Thermaswim is not suitable for hydrotherapy pools or pools heated above 89.6°F (32°C), where thermal swimwear may cause babies and young children to become too warm.
Baby & Toddler Thermaswim FAQs
The main difference between the two suits is affordability. The Thermaswim suits are designed without the TPU outer of the Warm in One, making them a more budget-friendly option. The Thermaswim is only available in plain black, while the Warm in One comes in a variety of prints.
Although the Thermaswim is not as thick as the Warm in One, its brushed fleece lining does provide warmth and it offers other benefits such as four-way stretch for maximum freedom of movement. Additionally, its thinner design allows it to be worn as a base layer under clothing for added warmth in colder conditions.
Yes, you can machine wash Thermaswim products if they are soiled. Otherwise, we recommend rinsing by hand to keep them in good condition.
Yes. There is no swim diaper incorporated in the Thermaswim Baby Suit.




