Skip to Content
Get Ready For FIRST TRACKS - New Arrivals + Epic Deals
Free Standard Shipping with $75+ Orders*
Every Product. Price & Performance Guaranteed.
  1. Products ...
  2. Clothing
  3. Underwear
  4. Base Layers
  5. Base Layer Tops

Base Layer Tops

186 Results
Sort By Sort By: Featured
Smartwool Men's Intraknit Thermal Merino Base Layer Crew Shirt
Smartwool

Smartwool Men's Intraknit Thermal Merino Base Layer Crew Shirt

$ 130.00 – $ 150.00
The Smartwool Men's Intraknit™ Thermal Merino Base Layer Crew Shirt combines Merino comfort with 3D mapping and mesh ventilation for warmth and performance.
Thermotech Kids' Performance Base Layer Set P00200062510002152_2.webp
Thermotech

Thermotech Kids' Performance Base Layer Set

$ 34.99
The Thermotech Toddlers' Performance Base Layer Set offers the midweight warmth, comfort and moisture management that your little one needs. !
Hot Chillys Little Kids' Originals Print Set
Hot Chillys

Hot Chillys Little Kids' Originals Print Set

$ 65.00 – $ 72.00 UP TO 9% OFF
The Hot Chillys Little Kids' Originals Print Set delivers cozy midweight warmth, moisture-wicking comfort, and playful winter style for toddlers on the go.
Hot Chillys Kids Originals Base Layer Set
Hot Chillys

Hot Chillys Kids Originals Base Layer Set

$ 54.95 $ 69.00 20% OFF
The Hot Chillys Toddler Originals Base Layer Set is constructed with spun polyester yarns for a soft hand feel and spandex to give it a 4-way stretch.
Hot Chillys Toddler Girl's Originals Print Set
Hot Chillys

Hot Chillys Toddler Girl's Originals Print Set

$ 60.00 $ 70.00 14% OFF
The Hot Chillys Toddler Girl's Originals Print Set is constructed with spun polyester yarns for a soft hand feel and spandex to give it a 4-way stretch.
Hot Chillys Little Boys' Toddler Boys Print Set P11200056930001801_2.webp
Hot Chillys

Hot Chillys Little Boys' Toddler Boys Print Set

$ 60.00 $ 60.00 14% OFF
The Hot Chillys Toddler Boy's Originals Print Set is constru
Smartwool Women's Classic Thermal Merino Base Layer Crew Shirt 00150065030002054-0003_01.jpg
Smartwool

Smartwool Women's Classic Thermal Merino Base Layer Crew Shirt

$ 82.93 – $ 115.00 UP TO 10% OFF
The Smartwool Women's Classic Thermal Merino Base Layer Crew Shirt offers warmth, comfort, and durability with 100% Merino wool for cold-weather adventures.
Patagonia Men's Capilene® Midweight Crew Baselayer Top 00020062260001901-0040_hero.webp
Patagonia

Patagonia Men's Capilene® Midweight Crew Baselayer Top

$ 79.00
The Patagonia Men's Capilene® Midweight Crew Baselayer Top is a classic, go-anywhere all-around baselayer, made with completely recycled content.
Hot Chillys Women's Pepper Bi-Ply Long Sleeve Crewneck Base Layer
Hot Chillys

Hot Chillys Women's Pepper Bi-Ply Long Sleeve Crewneck Base Layer

$ 11.93 $ 43.00 19% OFF
The Hot Chillys Women's Pepper Bi-Ply Long Sleeve Crewneck Baselayer
Nils Women's Robin 1/4 Zip T-Neck Sweater
Nils

Nils Women's Robin 1/4 Zip T-Neck Sweater

$ 120.00
The Robin 1/4 Zip T-Neck Sweater delivers soft brushed comfort stretch mobility and elevated everyday style with performance fabric feel. Shop now!
Mountain Tek Men's Performance Merino Base Layer Top 00060011730002600-0001_01.jpg New Arrival
Mountain Tek

Mountain Tek Men's Performance Merino Base Layer Top

$ 58.93 $ 74.99 21% OFF
The Performance Merino Base Layer Top offers breathable warmth, odor control, and flexible comfort for winter adventures and layering ease. Shop now!
Nils Women's Lisa 1/4 Zip Base Layer Top
Nils

Nils Women's Lisa 1/4 Zip Base Layer Top

$ 97.04 $ 107.82 10% OFF
The Lisa 1/4 Zip Base Layer Top offers luxurious Italian fabric comfort with natural wicking and a classic t neck design for versatile winter layering. Shop now!
Hot Chillys Men's Micro-Elite Chamois Crewneck New Arrival
Hot Chillys

Hot Chillys Men's Micro-Elite Chamois Crewneck

$ 77.00
The Hot Chillys Men's Micro-Elite Chamois Crewneck Fits like
Mountain Tek Men's Performance Base Layer Top 00030011730002600-0001_01.jpg New Arrival
Mountain Tek

Mountain Tek Men's Performance Base Layer Top

$ 34.93 $ 44.99 22% OFF
The Performance Base Layer Top features warm microfleece, moisture-wicking tech, and odor control for peak cold-weather comfort and versatility. Shop now!
Thermotech Kids' Performance Base Layer Top 00200062510002504-0001_01.jpg
Thermotech

Thermotech Kids' Performance Base Layer Top

$ 29.99 $ 34.99 14% OFF
The Thermotech Kids' Performance Base Layer Top offers the midweight warmth, comfort and moisture management that your little one needs.
Patagonia Women's Capilene Midweight Crew Baselayer Top
Patagonia

Patagonia Women's Capilene Midweight Crew Baselayer Top

$ 69.00 $ 69.00 12% OFF
The Patagonia Women's Capilene® Midweight Crew Baselayer Top
Hot Chillys Women's Micro Elite Top Black 11160056930001851-0001_01.jpg
Hot Chillys

Hot Chillys Women's Micro Elite Top Black

$ 64.99
The Hot Chillys Women's Micro Elite Top Black is made with p
Smartwool Women's Classic Thermal Merino Base Layer 1/4 Zip Shirt 00150065030002400-0334_01.jpg New Arrival
Smartwool

Smartwool Women's Classic Thermal Merino Base Layer 1/4 Zip Shirt

$ 120.00 – $ 130.00 UP TO 7% OFF
Stay warm and stylish with The Smartwool Classic Thermal Merino Base Layer 1/4 Zip Top. Perfect for outdoor adventures! Shop now.
Hot Chillys Micro-Elite Chamois Crewneck Top
Hot Chillys

Hot Chillys Micro-Elite Chamois Crewneck Top

$ 49.95
The Hot Chillys Kids' Micro-Elite Chamois Crewneck Top features a smooth face for easy layering, and a soft fuzzy interior for extra warmth without adding bulk.
Smartwool Women's Intraknit Thermal Merino Base Layer Crew Shirt
Smartwool

Smartwool Women's Intraknit Thermal Merino Base Layer Crew Shirt

$ 130.00 – $ 150.00 UP TO 13% OFF
The Smartwool Women's Intraknit™ Thermal Merino Base Layer Crew Shirt offers breathable warmth, advanced fit, and durable comfort for high-intensity cold-weather activity.
Mountain Tek Women's Extreme Base Layer Top 00130011730002600-0001_01.jpg New Arrival
Mountain Tek

Mountain Tek Women's Extreme Base Layer Top

$ 46.93 $ 59.99 21% OFF
The Extreme Base Layer Top keeps you warm, dry, and fresh in the coldest conditions with microfleece, four-way stretch, and odor control technology. Shop now!
Thermotech Women's Extreme Base Layer Top 00130062510002150-0001_01.jpg
Thermotech

Thermotech Women's Extreme Base Layer Top

$ 54.99
The Thermotech Women's Extreme Base Layer Top offers the heavyweight warmth, comfort and stretching you need to enjoy winter.
Seirus Women's Heatwave Mapped Long Sleeve 1/4 Zip Top P00090064030002000_2.jpg
Seirus

Seirus Women's Heatwave Mapped Long Sleeve 1/4 Zip Top

$ 134.99
The Seirus Women's Heatwave™ Mapped Long Sleeve 1/4 Zip Top provides the best quality and performance your body deserves.
Patagonia Women's Capilene Midweight Zip-Neck Baselayer Top
Patagonia

Patagonia Women's Capilene Midweight Zip-Neck Baselayer Top

$ 89.00
The Patagonia Women's Capilene Midweight Zip-Neck Baselayer Top is warm, breathable, quick-drying and made with HeiQ Fresh durable odor control for daily use.
Thermotech Women's Extreme 2 Technical Base Layer Crew Top P0013066831802_2.webp
Thermotech

Thermotech Women's Extreme 2 Technical Base Layer Crew Top

$ 10.93 $ 12.88 15% OFF
The Thermotech Women's Extreme 2 Technical Base Layer Crew Top offers top shelf performance base layer technology.
Hot Chillys Women's Clima-Tek Zip-T Top
Hot Chillys

Hot Chillys Women's Clima-Tek Zip-T Top

$ 70.00 – $ 85.00 UP TO 21% OFF
Hot Chillys new Clima-Tek fabric features a buttery soft, cottony hand, with all of the performance of a polyester/spandex.
Blackstrap Women's Summit Base Layer Crewneck Shirt 00090025440002504-0001_01.jpg
Blackstrap

Blackstrap Women's Summit Base Layer Crewneck Shirt

$ 27.93 $ 31.86 12% OFF
Stay warm and stylish on every adventure with the Blackstrap Women's Summit Base Layer Crewneck - shop now for ultimate comfort and performance!
Smartwool Women's Classic Thermal Merino Mock Neck Shirt 00150065030002500-0056_01.jpg
Smartwool

Smartwool Women's Classic Thermal Merino Mock Neck Shirt

$ 100.93 $ 112.82 10% OFF
The Smartwool Women's Classic Thermal Merino Mock Neck Shirt offers odor-resistant warmth, moisture management, and comfort for cold-weather outdoor activities.
Karbon Women's Matrix T-Neck Top
Karbon

Karbon Women's Matrix T-Neck Top

$ 81.75 $ 130.00 10% OFF
The Karbon Women's Matrix T-Neck Top delivers cozy thermal stretch fabric, a quarter zip pullover design, and reflective details for versatile cold weather performance.
Seirus Women's Heatwave Reversible Long Sleeve Crew Top P00090064030002002_2.jpg
Seirus

Seirus Women's Heatwave Reversible Long Sleeve Crew Top

$ 99.99
The Seirus Women's Heatwave™ Reversible Long Sleeve Crew Top provides all the comfort and warmth you need in this amazing reversible top.
Thermotech Women's Merino Wool Crewneck Top 00150062510002505-0001_01.jpg
Thermotech

Thermotech Women's Merino Wool Crewneck Top

$ 69.99
Stay warm and comfortable outdoors with the Thermotech Women's Merino Wool Crewneck Top. Shop now for ultimate performance!
Thermotech Women's Extreme Base Layer Top 00130062510002502-0001_01.jpg
Thermotech

Thermotech Women's Extreme Base Layer Top

$ 54.99
The Thermotech Women's Extreme Base Layer Top offers the heavyweight warmth, comfort and stretching you need to enjoy winter.
Hot Chillys Women's Micro-Elite Chamois Printed Crewneck Top
Hot Chillys

Hot Chillys Women's Micro-Elite Chamois Printed Crewneck Top

$ 90.00
The Hot Chillys Women's Micro-Elite Chamois Printed Crewneck Top has been the leader in body fit, technical performance thermal base layer for years.
Hot Chillys Men's Clima-Tek Zip-T Baselayer Top
Hot Chillys

Hot Chillys Men's Clima-Tek Zip-T Baselayer Top

$ 85.00 $ 89.50 5% OFF
Hot Chillys new Clima-Tek fabric features a buttery soft, cottony hand, with all of the performance of a polyester/spandex.
Smartwool Men's Classic All-Season Merino Base Layer Long Sleeve Shirt 00060065030002502-0001_01.jpg
Smartwool

Smartwool Men's Classic All-Season Merino Base Layer Long Sleeve Shirt

$ 90.00 $ 100.00 10% OFF
The Smartwool Men's Classic All-Season Merino Base Layer Long Sleeve Shirt offers durable comfort with Merino wool softness and year-round versatility.
Hot Chillys Men's La Montana Fleece Zip T-Neck 11180056930002154-0256_01.jpg
Hot Chillys

Hot Chillys Men's La Montana Fleece Zip T-Neck

$ 74.95
The Hot Chillys Men's La Montaa Fleece Zip T-Neck is truly the king of the mountain for warmth.
ActionHeat Women's 5V Battery Heated Base Layer Shirt 00090025650002100-0001_01.jpg
ActionHeat

ActionHeat Women's 5V Battery Heated Base Layer Shirt

$ 159.99
The ActionHeat Women's 5V Battery Heated Base Layer Shirt delivers flexible, battery-powered warmth with breathable comfort and lasting performance in cold conditions.
Nils Women's Lisie T-Neck 00090061640002258-0007_Back.webp
Nils

Nils Women's Lisie T-Neck

$ 62.93 $ 70.85 11% OFF
The Nils Women's Lisie T-Neck is extremely versatile and lightweight.
Mountain Tek Women's Performance Base Layer Top 00120011730002600-0001_01.jpg New Arrival
Mountain Tek

Mountain Tek Women's Performance Base Layer Top

$ 34.93 $ 44.99 22% OFF
The Performance Base Layer Top delivers moisture-wicking warmth, odor control, and flexible comfort for cold-weather layering and active winter wear. Shop now!
Nils Women's Leah Base Layer Top
Nils

Nils Women's Leah Base Layer Top

$ 58.37 $ 64.85 10% OFF
The Leah Base Layer Top combines luxurious Italian fabric with natural wicking and anti-microbial properties for performance and comfort. Shop now!