+More Colors - Baby & Toddler Cotton Autumn-Winter Thermal Underwear Suit – Soft & Warm Base Layer for Babies

Keep your little one warm and comfortable through fall and winter with this Cotton Autumn-Winter Thermal Underwear Suit, designed as a soft and breathable base layer for infants and toddlers. Made from gentle, high-quality cotton, this thermal suit provides dependable insulation without excess bulk, making it ideal for everyday wear, layering under outfits, or outdoor play on chillier days. The suit delivers full coverage with a long-sleeve top and matching bottoms, helping regulate body temperature while maintaining natural movement.

The flexible, snug design moves with your baby, ensuring freedom of movement while retaining heat without restricting activity. Its soft cotton fabric feels gentle against delicate skin, and the balanced construction supports comfort from morning snuggles to afternoon fun. This suit is engineered as a dependable base layer for colder months, helping keep infants and toddlers comfortable during seasonal transitions.

Available in +More Colors and the following size options — 3-8M, 8-12M, 1-2T, and 2-3T — this thermal underwear set accommodates growing little ones at key early stages. Select the appropriate size from the dropdown to ensure a secure fit and consistent warmth throughout the season.