Best Athletic Base Layers for Girls of 2025

Stay warm and cozy with the Thermajane Girls Thermal Set. This ultra soft and comfortable thermal underwear set is perfect for keeping your child warm during the cold winter months. The fleece lining provides extra warmth, making it great as a base layer under their clothes or for wearing alone around the house. With its moisture-wicking properties, this set helps keep your kids dry and odor-free even during physical activities. The 4-way stretch ensures a snug fit that moves with your child, allowing for unrestricted movement. Layer up easily with this set, as it has no added bulk and fits comfortably under regular clothes. Keep your child protected from the cold with the Thermajane Girls Thermal Set.

The Fruit of the Loom Thermal Set is designed to keep your girl warm during the chilly fall and winter months. Made from recycled polyester, these super soft long johns provide a cozy base layer for any outdoor activity. The moisture-wicking fabric ensures she stays dry, making it perfect for active play. Plus, the tag-free design enhances comfort, allowing her to move freely without irritation. This set is an excellent choice for parents looking for reliable and comfortable thermal wear for their children.

Sweet Hearts Base Layer Set is a cozy and warm 2-piece fleece-lined outfit for girls. The top and long johns are perfect for layering and relaxing, providing extra warmth during winter days. The thermal tee ensures maximum comfort on cold days, while the matching long john jogger bottoms offer freedom of movement with their elastic waistband. This set, made in the USA, is ideal for outdoor activities, offering reliable warmth and insulation for your active little girl.

The Cuddl Duds Thermal Set keeps your kids warm during cold weather. With a soft fleece lining and moisture-wicking fabric, this set helps manage sweat, ensuring they stay dry and comfortable. The spandex stretch allows for flexible movement, making it perfect for active kids on chilly days. Additionally, the thermal underwear offers UV protection, so they can enjoy outdoor adventures safely. Designed for comfort, the tag-free label minimizes irritation, allowing for an itch-free experience. This stylish base layer makes layering easy and enjoyable.

The Reebok Base Layer Set is designed specifically for active girls aged 6-14. It includes a long sleeve shirt and full-length leggings, both crafted for a snug fit, making them perfect for layering. The lightweight fabric helps keep you warm by trapping body heat, ideal for outdoor sports or chilly days. With durable seams, this set is built to withstand frequent use, ensuring it lasts through many seasons. Plus, it's easy to care for—just machine wash and tumble dry, so you can spend more time enjoying activities and less on laundry.

The Lands' End Thermal Shirt is designed for ultimate comfort and warmth. Made from a soft blend of polyester and spandex, it feels cozy against the skin while providing flexibility for active play. The innovative Thermaskin technology helps keep you warm by absorbing moisture, ensuring you stay dry throughout the day. With flatlock stitching, you won't have to worry about chafing during wear. Plus, the convenient thumb holes keep the sleeves in place, making it perfect for layering under other clothing. This top is a fantastic choice for chilly days!

The Arctix Girls Base Layer Top is perfect for any active girl. The 4-way stretch fabric enhances comfort and mobility, allowing you to move freely during any activity. The insulating and wind-resistant materials keep you warm and protected from the cold weather. The wicking technology pulls moisture away from your body, leaving you dry and comfortable. Additionally, the fabric contains properties that reduce odor, keeping you fresh during and after your workout. The flatlock seams add extra comfort and ease of movement, making this top your go-to for any outdoor activity.

The HSTiSan Compression Set offers a perfect blend of comfort and performance for your active kids. Made from elastic, quick-drying fabric, it ensures that your child stays comfortable during sports like basketball and soccer. The moisture-wicking design effectively draws sweat away from the skin, helping to keep them dry. Additionally, the thermal properties of this outfit provide warmth while allowing breathability, making it suitable for various outdoor activities. Whether it's a chilly day at the playground or a rainy sports practice, this set is a reliable choice for staying warm and active.

The INNERSY Thermal Set is perfect for keeping your child warm in cold weather. Designed for temperatures between 0-15℃, this base layer effectively traps body heat to ensure comfort. The moisture-wicking fabric helps manage perspiration, keeping them dry during active play or outdoor sports. Additionally, the soft material and smooth waistband provide a snug yet flexible fit, allowing for unrestricted movement during activities like skiing or hiking. This stylish set not only offers practicality but also adds a fashionable touch to their winter wardrobe.

Stay warm and cozy with the Rocky Thermal Top. Crafted with a high-quality spandex-based fabric, this top stays put without any bunching or binding, even when worn with multiple layers. The moisture-wicking fibers keep you dry and comfortable throughout the day, preventing embarrassing sweat stains. Unlike traditional wool thermal underwear, these tops won't itch or irritate your skin. They are also machine washable, ensuring easy cleanup without sacrificing a snug fit. Designed for active girls, the Rocky Thermal Top features close-fit openings that keep it firmly in place, without feeling suffocating. Whether you're hitting the slopes or lounging at home, this thermal top is a must-have for extreme cold weather.