Best Thermal Sets for Girls of 2025

The Heatwave Thermal Set is designed to keep your child warm during winter. This set includes a long sleeve top and pants, perfect for layering under clothing. With a 0.45 TOG rating, it effectively holds warm air close to the skin, ensuring your little one stays snug. Available in various sizes from ages 3 to 13, it caters to a wide range of children. Plus, it is machine washable, making it easy for you to clean and maintain.

The INNERSY Kids Thermal Set is designed for comfort and flexibility. Crafted from lightweight fabric, it provides a snug fit while allowing room for growth. You can wear it as thermal pyjamas or under school uniforms, ensuring warmth during chilly days. With a stylish sweatshirt collar and long sleeves, it keeps you cosy without embarrassment. The elasticated waistband on the leggings adds to the comfort, making it ideal for outdoor activities such as skiing or PE classes while allowing full freedom of movement.

The LAPASA Thermal Set provides exceptional warmth and comfort for your child. Made from a soft fabric, it wraps around the skin gently, ensuring they feel cosy even in the coldest weather. Designed to flex and stretch, this set allows for full freedom of movement, making it perfect for active play or outdoor sports. Its snug fit prevents any bunching, reducing heat loss and keeping your child warm. Additionally, it effectively wicks away moisture, keeping them dry and comfortable during various activities or while relaxing at home.

The LAPASA Thermal Underwear is designed for comfort and warmth during winter sports. Made from high-elasticity fabric, it ensures a snug fit that moves with you. The mid-collar design adds extra protection, keeping your neck warm and shielded from the cold wind. Additionally, its quick-dry feature absorbs sweat instantly, allowing you to stay dry and comfortable during activities. With an ergonomic wide belt, it reduces pressure on the waist, enhancing overall comfort for your child.

The Outland Thermal Underwear Set is perfect for keeping your child warm during the cold winter months. Once they try these thermals, they'll love how comfortable and snug they feel, making it easier for you to get them to wear warm clothing. Designed for various outdoor activities like skiing and cycling, these thermal sets ensure your child stays active without the chill slowing them down. Additionally, they are lightweight and easy to pack, making them an excellent choice for travel or camping trips.

The Trespass Unite360 Baselayer Set is perfect for keeping your child comfortable and dry during outdoor activities. The 1/2 zip neck top allows for an easy fit, making it simple to put on and take off. With flat seams designed for comfort, your child can move freely without irritation. The long sleeves provide extra warmth, ensuring they stay cosy in cooler weather. Additionally, the elasticated waist on the bottoms offers a better fit, allowing for unrestricted movement while they play.

The MyShoeStore Thermal Set features advanced thermal technology that ensures your child stays warm during colder weather. The internally brushed fabric provides ultimate comfort, making it perfect for daily wear. With a 0.45 Tog rating, this set offers extra warmth for activities like camping or skiing. The maximum warmth fabric construction adds an extra layer of insulation, keeping the chill at bay while your child enjoys outdoor adventures.

The Hikewin Thermal Set for Girls is designed to keep your little one warm and comfortable. Made from high-quality diamond velvet, this fabric is particularly soft, breathable, and skin-friendly, perfect for sensitive skin. The heat retention feature ensures that your child stays warm, whether they are playing outside or lounging at home. With its ultra-soft plush blend, this long underwear set offers exceptional comfort during cold weather. Plus, the moisture-wicking properties keep your child dry and odour-free, allowing for an enjoyable day of activity.

The BOZEVON Thermal Underwear Set is designed to keep you warm during cold days, in air-conditioned rooms, or while warming up for dance. Made from a soft and stretchy blend of velvet and spandex, it ensures comfort and ease of movement. This versatile set is perfect for various activities, including ballet, gymnastics, and yoga, as well as daily wear or special occasions. Additionally, it is easy to maintain, as it can be hand-washed or machine-washed without the hassle of bleaching or dry cleaning.

The Nautica Thermal Underwear Set is designed to keep your girl warm and comfortable. Its active stretch fabric allows for easy and flexible movement, making it perfect for active days. The heat retention feature circulates body heat, ensuring she stays cosy even in cooler weather. Additionally, the breathable fabric helps regulate temperature, performing well whether it's warm or cool outside. Lightweight yet protective, this set offers the classic comfort your child needs for everyday wear.