Best Thermal Bottoms for Girls of 2025

John Zimmer Avatar
John Zimmer
Last Updated: 6 Feb 2025

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These thermal bottoms are a practical and cozy addition to any girl's winter wardrobe. Designed to provide extra warmth and insulation, these bottoms are perfect for layering under skirts or trousers. Made from a soft and comfortable fabric, they offer excellent heat retention without compromising on comfort. Whether for outdoor activities or simply keeping warm at home, these thermal bottoms are a reliable choice for girls looking to stay snug during the colder months.

At a Glance: Our Top Picks

Rocky Girl's Thermal Bottoms for Ski Warmth Cover #TOP 1
Rocky Girl's Thermal Bottoms for Ski Warmth
ftb score rating icon 9.8
Octave Girls Thermal Long Pants for Warmth Cover #TOP 2
Octave Girls Thermal Long Pants for Warmth
ftb score rating icon 9.7
CMP Kids Warm Functional Long Pant Cover #TOP 3
CMP Kids Warm Functional Long Pant
ftb score rating icon 9.5

Top 10 Thermal Bottoms for Girls

#TOP 1

Rocky Girl's Thermal Bottoms for Ski Warmth

Rocky
Rope Design
Rocky Girl's Thermal Bottoms for Ski Warmth Cover
Rocky Girl's Thermal Bottoms (Long John Base Layer Underwear Pants) Insulated for Outdoor Ski Warmth/Extreme Cold Pajamas, Rope Design, M

The Rocky Thermal Bottoms are designed for comfort and warmth in cold weather. The fleece-lined fabric ensures you stay cosy without adding bulk to your outfit, making them perfect for outdoor activities or lounging at home. With a high-quality spandex blend, you won’t have to worry about awkward adjustments, allowing you to focus on enjoying your day. Additionally, the moisture-wicking fibres help keep you dry and comfortable, effectively preventing any embarrassing sweat stains throughout the day.

What We Like
Fleece-lined for warmth
No awkward bunching
Moisture-wicking for dryness
Durable and machine washable
#TOP 2

Octave Girls Thermal Long Pants for Warmth

3-RT9-12/13W
White
12-13 Years
Octave Girls Thermal Long Pants for Warmth Cover
Octave® Girls Thermal Underwear Long Pants (Viscose, Fancy Knit) [12/13 Yrs, White]

The Octave Girls Thermal Pants are designed with your comfort in mind. The fully brushed inside provides exceptional warmth and softness, making them perfect for chilly days. The ribbed fabric offers added stretch, ensuring you can move freely and comfortably. With a body contouring design, these pants promise a snug fit while effectively wicking away sweat, keeping you dry and comfortable. Ideal for school or camping trips, they are lightweight yet cozy, making them a great addition to your wardrobe.

What We Like
Extra warmth and softness
Stretchy and comfortable fabric
Perfect fit for active wear
Lightweight yet cosy material
#TOP 3

CMP Kids Warm Functional Long Pant

CMP
3Y04261
White
CMP Kids Warm Functional Long Pant Cover
CMP - Kids Long Pant, White, 164

The CMP Kids Long Pant is designed to keep your little ones warm and comfortable. The warm functional base layer provides excellent insulation, making it perfect for chilly days. Its fast-wicking and quick-drying fabric ensures that any moisture is rapidly removed, keeping them dry during active play. The fluffy fabric adds an extra layer of softness, making it delightful to wear. Additionally, the flat seams prevent chafing, allowing for unrestricted movement and comfort throughout the day.

What We Like
Warm functional base layer
Quick-drying and moisture-wicking
Soft fluffy fabric
Comfortable flat seams
#TOP 4

Columbia Starchaser Peak II Insulated Ski Trousers

Columbia
1523691
Nocturnal
Columbia Starchaser Peak II Insulated Ski Trousers Cover
Columbia Sportswear Starchaser Peak II Pant Ski Trousers - Nocturnal, X-Small

The Columbia Starchaser Peak II Pants are designed for girls who love winter sports. They feature insulated synthetic down, which provides excellent warmth, keeping you comfortable during chilly outdoor adventures. The waterproof fabric ensures you stay dry, no matter the conditions, allowing you to enjoy your time on the slopes without worry. Additionally, the OUTGROWN grow system adjustable waist means these trousers can adapt as you grow, offering extended use. Lastly, the reinforced cuff guard protects against wear and tear, making them durable for all your skiing needs.

What We Like
Warm insulated fabric
Waterproof for wet conditions
Adjustable waist for growth
Durable cuff guard
#TOP 5

CMP Kids Warm Functional Base Layer Pants

CMP
3Y04261
Gray Mel.
CMP Kids Warm Functional Base Layer Pants Cover
CMP - Kids Long Pant, Gray Mel., 140

The CMP Kids Long Pant is designed as a warm functional base layer that offers impressive comfort and warmth for your little ones. With fast wicking and quick drying properties, these pants keep you dry and comfortable during outdoor activities. The fluffy fabric adds an extra layer of softness, ensuring a pleasant wearing experience. Flat seams help to eliminate irritation, making these pants ideal for all-day wear. Your child will enjoy both warmth and comfort, whether they are playing outside or relaxing at home.

What We Like
Warm and comfortable
Quick drying
Soft fluffy fabric
Flat seams for comfort
#TOP 6

CMP Women's White XL Sweatshirt

CMP
3Y06256
White
CMP Women's White XL Sweatshirt Cover
CMP - Woman Sweat, White, XL

The CMP Women's Sweatshirt is designed for functionality and comfort. Its highly functional fabric ensures you stay warm and comfortable during various activities. The flatlock seams provide a smooth finish, reducing chafing and irritation, making it ideal for extended wear. Additionally, the perfect fit means you can move freely without feeling restricted, allowing you to enjoy your day with ease. This sweatshirt is a great choice for anyone looking for a reliable and stylish addition to their wardrobe.

What We Like
Highly functional design
Flatlock seams for comfort
Perfect fit for freedom of movement
#TOP 7

Fruit of the Loom Girls' Thermal Waffle Bottoms

WRT21002-2P
Fruit of the Loom Girls' Thermal Waffle Bottoms Cover
Fruit of the Loom Girls' Premium 2-Pack Thermal Waffle Bottom, Heather Greystone/Natural, 7 / 8

The Fruit of the Loom Thermal Bottoms are perfect for keeping your little girl warm during colder days. This two-pack offers great value, ensuring you always have a pair ready. The thermal long pants provide essential insulation, making them ideal for chilly weather. Additionally, the moisture-wicking and quick-drying fabric keeps her comfortable and dry, so she can play without worry. Cuffed ankles help to trap heat, offering extra warmth where it’s needed most. With a tagless waistband, there’s no irritation, allowing for all-day comfort.

What We Like
Two-pack value
Warm insulation
Moisture-wicking fabric
Cuffed ankles
Tagless waistband
#TOP 8

CMP Kids Black Long Thermal Pants

CMP
3Y04261
Black
CMP Kids Black Long Thermal Pants Cover
CMP - Kids Long Pant, Black, 152

The CMP Kids Thermal Pants are designed to provide warmth and comfort for your little ones. Made from fluffy fabric, they are soft against the skin, ensuring a cosy fit. With quick moisture wicking properties, these pants help keep you dry during active play. Additionally, they dry quickly, so you won't have to worry about dampness after a wash. The flat seams add an extra layer of comfort, preventing chafing and irritation. These features make them an ideal choice for outdoor adventures or lounging at home.

What We Like
Warm and cosy fabric
Quick moisture wicking
Fast drying
Comfortable flat seams
#TOP 9

Smartwool Black Thermal Bottoms for Kids

BSN112001
Black
Smartwool Black Thermal Bottoms for Kids Cover
Smartwool Bottoms - Black, Medium

The Smartwool Thermal Bottoms are designed with your comfort in mind. The covered elastic waistband ensures a snug fit without feeling restrictive. With flat lock seam construction, you can say goodbye to chafing, allowing for a more enjoyable wear experience. These form-fitting bottoms are perfect for layering on cooler days, yet they are also suitable for wearing alone on milder occasions. Whether for infants or toddlers, these bottoms provide versatile comfort for every little adventure.

What We Like
Comfortable elastic waistband
Chafing-free flat lock seams
Form-fitting design
Suitable for layering
Versatile for various temperatures
#TOP 10

Killtec Girls' Gauror Jr Ski Trousers

31941-000
Koralle
Killtec Girls' Gauror Jr Ski Trousers Cover
Killtec Girls' Gauror Jr Ski Trousers, Neon Coral, 176 EU

The Killtec Gauror Jr Trousers are designed for active girls who love skiing. With functional straps and a snow guard, you can enjoy your time on the slopes without worrying about snow getting in. The 2-way stretch fabric allows for easy movement, ensuring you can ski freely. Additionally, with a breathability rating of 3,000 g/m²/24h, you will stay comfortable even during intense activity. The waterproof material, featuring a hydrostatic head of 10,000 mm, keeps you dry in wet conditions, enhancing your overall skiing experience.

What We Like
Waterproof and breathable
Flexible 2-way stretch
Functional snow guard
Durable edge protection
Buying Guide Image
Editor's Notes

During our thermal bottom for girls research, we found 19 thermal bottom for girls products and shortlisted 10 quality products. We collected and analyzed 6,561 customer reviews through our big data system to write the thermal bottoms for girls list. We found that most customers choose thermal bottoms for girls with an average price of £28.55.

The thermal bottoms for girls are available for purchase. We have researched hundreds of brands and picked the top brands of thermal bottoms for girls, including Rocky, Octave, CMP, Columbia, Fruit of the Loom.

Written by
John Zimmer Avatar

John Zimmer is a truly professional writer on findthisbest.com. He has specialized in writing content a wide variety of fields for over a decade. Since 2011, he has been using his expertise and extensive experience to write content for online shopping guide websites. In addition to writing for findthisbest.com, he has appeared in publications such as The Spruce, Wirecutter and Bestbuy.