You’ll find a wide mix of thermal base layers here, designed for everyday warmth and easy layering.

• Women’s bottoms: high-waisted and natural-rise leggings, including underscrub styles.
• Women’s tops: crewnecks and mock necks, some with thumbhole or mitten-style cuffs.
• Fabrics: smooth microfiber, stretch fleece, and textured grid constructions for different warmth and feel.
• Warmth tiers: options ranging from lightweight to plush and extra-warm for colder days.
• Men’s options: base layer pants in multiple sizes.
• Sizing: women’s sizes typically XS–4X and men’s S–3XL on select items.
• Shopping: online availability with delivery or pickup, depending on location and season.

Use filters for size, warmth level, color, and fabric to quickly narrow your choices.

Think about your activity, climate, and how you plan to layer. Different fabric constructions offer different benefits.

• Indoors or mild days: lightweight, smooth microfiber can feel breathable under everyday outfits.
• Chilly commutes: cozy, brushed interiors (often called fleece) add softness and warmth without feeling bulky.
• Active or variable temps: grid-texture designs help trap heat while allowing airflow to reduce overheating.
• Deep cold: extra-warm builds with thicker or dual-surface fabrics can add insulation under outerwear.

It can help to consider what you’ll wear over the base layer and your personal tolerance for warmth. If you run hot, start lighter; if you tend to feel cold, consider a plush or heavier option.

Base layers usually work best with a close-to-body fit that’s comfortable, not restrictive. That said, fit is personal.

• Check the size chart: compare your measurements to the product’s waist, hip, chest, and inseam guides.
• Intended use: for layering under uniforms or scrubs, a trim fit can minimize bulk; for lounging, a roomier feel may be preferred.
• Between sizes: if you like more ease, consider sizing up; for a snug base layer effect, choose closer to true size.
• Rise and length: high-rise waists add coverage; review inseam and sleeve length for your height.
• Feedback: customer reviews on the product page can offer notes on stretch and fit.

Comfort and mobility are key—move around at home to gauge how the layer feels under clothing.

Each fabric brings a distinct feel and performance, so the right pick depends on your needs.

• Fleece (brushed interior): soft and cozy against skin, adds warmth and comfort in cool to cold weather; may feel slightly thicker under slim-fit clothes.
• Microfiber (smooth knit): lightweight and sleek, glides under layers easily; can feel cooler to the touch and is often a good first layer for everyday wear.
• Grid-knit constructions: raised channels help trap heat while allowing breathability, useful for active days or fluctuating temperatures.

Consider how you’ll use the layer—fleece for plush warmth, microfiber for streamlined layering, and grid textures for a balance of insulation and airflow.

They’re versatile for more than just under-jeans warmth, depending on fabric and coverage.

• Athleisure: pair with an oversized sweater, tunic, or longline hoodie for errands or travel.
• Loungewear: brushed or plush styles can feel cozy at home without extra layers.
• wear as a hidden layer for added insulation without bulk.
• Outdoor days: use as a base under snow pants or hiking shells for extra insulation.
• Coverage check: darker colors and thicker knits typically offer more opacity; review photos and descriptions to match your comfort level.

Styling ultimately comes down to preference—choose tops with longer hems if you want more coverage, and pick fabrics that feel good for your plans.