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Women's Base Layers from Smartwool, Icebreaker, Columbia & Other Top Brands — 128 products / 950 models

The great outdoors is calling, but frosty mornings and mountain breezes shouldn't hold you back. Lay the foundation for any adventure with a women's base layer from OpticsPlanet. Our selection of performance-driven ski base layers and thermal base layers wicks away sweat, traps warmth, and keeps you comfortable all day long. Find the perfect Smartwool base layer, Columbia base layer, or other base layer for women from top outdoor clothing brands. Look for merino wool base layers that are naturally odor-resistant and provide exceptional insulation, even when wet. Perfect for layering under ski jackets or for standalone wear on milder hikes. Flatlock seams prevent chafing, and stretchy fabrics move with your body for a full range of motion. Advanced moisture-wicking technology pulls sweat away from your skin, keeping you dry and comfortable during high-intensity activities. From lightweight options for active pursuits to cozy merino wool for ultimate warmth, we have a base layer to suit your needs and activity level.image

Should a Base Layer Be Tight?

Your base layer should ideally fit snug but not tight. Here's a breakdown of the ideal fit:

  • The base layer should skim your curves comfortably without sagging or bagging. This close fit lets the material wick sweat away from your skin effectively.
  • Your base layer should allow you to move freely and comfortably. Avoid anything that digs in or feels restrictive.
  • Think of your base layer as a second skin, not a compression suit.
  • If you're between sizes or prefer a looser fit, consider sizing up in your base layer.
  • Different materials may hug your body differently. For example, merino wool naturally has a more forgiving drape than synthetic materials.

By finding the right balance between snug and loose, you'll get the most out of your base layer in comfort and performance.

Buy Women's Base Layers Online at OpticsPlanet

Don't let frosty mornings or mountain chills dictate your adventures. Browse our curated selection of women's cold weather base layers for a perfect fit and all day comfort. From moisture-wicking synthetics to naturally odor-resistant merino wool, we have the best women's outdoor clothing you need to conquer the outdoors, one comfortable layer at a time. You can also get Free Shipping on most orders over $49! Shop now and transform frosty mornings into epic adventures!

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128 Products in Women's Baselayers

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Image of Smartwool Intraknit Merino 200 Crew - Women's 6 models Smartwool Intraknit Merino 200 Crew - Women's As Low As (Save Up to 43%) $74.49 Blazin' Deal
Image of Smartwool Intraknit Merino Thermal Legging - Women's 5 models Smartwool Intraknit Merino Thermal Legging - Women's (1) As Low As (Save Up to 25%) $112.49 Blazin' Deal
Image of Smartwool Classic Thermal Merino Base Layer Crew - Women's 15 models Smartwool Classic Thermal Merino Base Layer Crew - Women's $115.00 15% Coupon
Image of Smartwool Merino 250 Baselayer Crew - Women's 6 models Smartwool Merino 250 Baselayer Crew - Women's (1) As Low As (Save Up to 31%) $79.49 Blazin' Deal
Image of Icebreaker Merino 200 Oasis Long Sleeve Crew Thermal Top - Women's 21 models Icebreaker Merino 200 Oasis Long Sleeve Crew Thermal Top - Women's $105.00 15% Coupon
Image of Columbia Omni Heat Helix Baselayer Crew - Women's 5 models Columbia Omni Heat Helix Baselayer Crew - Women's As Low As (Save Up to 42%) $43.49 Blazin' Deal
Image of Columbia Omni Heat Helix Baselayer Tight - Women's 5 models Columbia Omni Heat Helix Baselayer Tight - Women's As Low As (Save Up to 42%) $43.49 Blazin' Deal
Image of Smartwool Merino 250 Baselayer Bottom - Women's 8 models Smartwool Merino 250 Baselayer Bottom - Women's $115.00 15% Coupon
Image of Icebreaker Merino 150 Siren SS Sweetheart - Women's 8 models Icebreaker Merino 150 Siren SS Sweetheart - Women's $75.00 15% Coupon
Image of Icebreaker Merino 260 Vertex LS Half Zip Falling Flakes Top - Women's 3 models Icebreaker Merino 260 Vertex LS Half Zip Falling Flakes Top - Women's As Low As (Save Up to 45%) $82.49 Blazin' Deal
Image of Smartwool Classic All-Season Merino Base Layer Long Sleeve Plus - Women's 2 models Smartwool Classic All-Season Merino Base Layer Long Sleeve Plus - Women's As Low As (Save Up to 35%) $58.49 Blazin' Deal
Image of Smartwool Classic All-Season Merino Base Layer Long Sleeve - Women's 9 models Smartwool Classic All-Season Merino Base Layer Long Sleeve - Women's As Low As (Save Up to $6.51) $83.49 Blazin' Deal
Image of Fjallraven Abisko Trekking Tights Pro - Women's 20 models Fjallraven Abisko Trekking Tights Pro - Women's As Low As (Save Up to 35%) $96.99
Image of Under Armour Coldgear 4.0 Leggings - Women's 5 models Under Armour Coldgear 4.0 Leggings - Women's As Low As (Save Up to 28%) $79.99
Image of Rothco Mock Turtleneck Dickie 5 models Rothco Mock Turtleneck Dickie As Low As (Save Up to 25%) $8.99 15% Coupon
Image of Under Armour Tactical Crew CGI Base - Women's 5 models Under Armour Tactical Crew CGI Base - Women's As Low As (Save Up to $4.10) $59.89
Image of Mammut Aenergy FL Half Zip Longsleeve - Women's 6 models Mammut Aenergy FL Half Zip Longsleeve - Women's $99.00 15% Coupon
Image of Under Armour Tactical CGI Base Leggings - Women's 6 models Under Armour Tactical CGI Base Leggings - Women's As Low As (Save Up to 25%) $56.00
Image of DRIFIRE FR Ultra-Lightweight Short Sleeve Tee - Women's 49 models DRIFIRE FR Ultra-Lightweight Short Sleeve Tee - Women's As Low As (Save Up to 46%) $42.50
Image of King's Camo XKG Elevation 1/4 Zip Tee - Womens 5 models King's Camo XKG Elevation 1/4 Zip Tee - Womens List: $59.99 (Save $5.00) $54.99
Image of Icebreaker Merino 200 Oasis Leggings - Women's 3 models Icebreaker Merino 200 Oasis Leggings - Women's $105.00 15% Coupon
Image of Icebreaker Merino 260 Tech Leggings - Women's 3 models Icebreaker Merino 260 Tech Leggings - Women's $125.00 15% Coupon
Image of Columbia Midweight Stretch Tight - Women's 10 models Columbia Midweight Stretch Tight - Women's $55.00 15% Coupon
Image of Columbia Midweight Stretch Long Sleeve Top - Women's 10 models Columbia Midweight Stretch Long Sleeve Top - Women's $55.00 15% Coupon
Image of Mountain Hardwear Kor Alloy Tight - Women's 8 models Mountain Hardwear Kor Alloy Tight - Women's As Low As (Save Up to 75%) $49.49 Blazin' Deal
Image of Smartwool Intraknit Thermal Merino Base Layer 3/4 Bottom - Women's 2 models Smartwool Intraknit Thermal Merino Base Layer 3/4 Bottom - Women's As Low As (Save Up to 43%) $68.49 Blazin' Deal
Image of Icebreaker Merino 200 Oasis Long Sleeve Half Zip Thermal Top - Women's 6 models Icebreaker Merino 200 Oasis Long Sleeve Half Zip Thermal Top - Women's $115.00 15% Coupon
Image of Icebreaker Merino 260 Tech High Rise Leggings - Women's 6 models Icebreaker Merino 260 Tech High Rise Leggings - Women's As Low As (Save Up to 47%) $66.49 Blazin' Deal
Image of Smartwool Intraknit Thermal Merino Base Layer Colorblock 1/4 Zip - Women's 8 models Smartwool Intraknit Thermal Merino Base Layer Colorblock 1/4 Zip - Women's $140.00 15% Coupon
Image of Icebreaker Merino 260 Tech Long Sleeve Half Zip Thermal Top - Women's 9 models Icebreaker Merino 260 Tech Long Sleeve Half Zip Thermal Top - Women's $135.00 15% Coupon
Image of Smartwool Classic All-Season Merino Base Layer Crew - Women's 19 models Smartwool Classic All-Season Merino Base Layer Crew - Women's As Low As (Save Up to 20%) $72.00 15% Coupon
Image of Royal Robbins Backcountry Pro Winter Legging - Womens 5 models Royal Robbins Backcountry Pro Winter Legging - Womens As Low As (Save Up to 54%) $43.30 Blazin' Deal
Image of Obermeyer Sarah 1/4 Zip - Womens Obermeyer Sarah 1/4 Zip - Womens List: $99.00 (Save 33%) $65.99 15% Coupon
Image of Smartwool Classic All-Season Merino Base Layer Bottom Plus - Women's 5 models Smartwool Classic All-Season Merino Base Layer Bottom Plus - Women's As Low As (Save Up to 34%) $59.49 Blazin' Deal
Image of Icebreaker Merino 260 ZoneKnit Long Sleeve Half Zip Thermal Top - Women's 6 models Icebreaker Merino 260 ZoneKnit Long Sleeve Half Zip Thermal Top - Women's $185.00 15% Coupon
Image of Smartwool Intraknit Thermal Merino Base Layer Crew - Women's 8 models Smartwool Intraknit Thermal Merino Base Layer Crew - Women's $130.00 15% Coupon
Image of Icebreaker Merino 260 Tech Long Sleeve Crew Thermal Top - Women's 6 models Icebreaker Merino 260 Tech Long Sleeve Crew Thermal Top - Women's $125.00 15% Coupon
Image of Smartwool Classic Thermal Merino Base Layer One Piece - Women's 4 models Smartwool Classic Thermal Merino Base Layer One Piece - Women's $250.00 15% Coupon
Image of Smartwool Intraknit Thermal Merino Base Layer Bottom - Women's 12 models Smartwool Intraknit Thermal Merino Base Layer Bottom - Women's As Low As (Save Up to 43%) $74.49 Blazin' Deal
Image of Marmot Elda Jogger - Women's 2 models Marmot Elda Jogger - Women's As Low As (Save Up to 76%) $20.49 Blazin' Deal
Image of Krimson Klover Gigi Bottom - Women's 2 models Krimson Klover Gigi Bottom - Women's List: $79.00 (Save 52%) $37.53 Blazin' Deal
Image of Indera Traditional Thermal Bottom - Women's 3 models Indera Traditional Thermal Bottom - Women's As Low As (Save Up to 23%) $8.99
Image of Icebreaker Merino 260 ZoneKnit Leggings - Women's 6 models Icebreaker Merino 260 ZoneKnit Leggings - Women's $175.00 15% Coupon
Image of Icebreaker Merino 260 ZoneKnit Long Sleeve Crew Thermal Top - Women's 6 models Icebreaker Merino 260 ZoneKnit Long Sleeve Crew Thermal Top - Women's $175.00 15% Coupon
Image of Smartwool Classic All-Season Merino Base Layer Bottom - Women's 11 models Smartwool Classic All-Season Merino Base Layer Bottom - Women's As Low As (Save Up to $6.51) $83.49 Blazin' Deal
Image of Smartwool Classic Thermal Merino Base Layer Crew Plus - Women's 2 models Smartwool Classic Thermal Merino Base Layer Crew Plus - Women's As Low As (Save Up to 39%) $69.79 15% Coupon
Image of Smartwool Classic Thermal Merino Base Layer 1/4 Zip - Women's 16 models Smartwool Classic Thermal Merino Base Layer 1/4 Zip - Women's $120.00 15% Coupon
Image of Smartwool Classic Thermal Merino Base Layer Bottom - Women's 8 models Smartwool Classic Thermal Merino Base Layer Bottom - Women's $115.00 15% Coupon
Image of Under Armour ColdGear Base 2.0 Crew Long Sleeve Shirts - Women's Under Armour ColdGear Base 2.0 Crew Long Sleeve Shirts - Women's List: $67.49 (Save 11%) $59.89
Image of Under Armour Coldgear Base 2.0 Leggings - Women's 5 models Under Armour Coldgear Base 2.0 Leggings - Women's List: $69.79 (Save 21%) $55.34
Image of Under Armour Tac Mock CGI Base - Women's 5 models Under Armour Tac Mock CGI Base - Women's As Low As (Save Up to 11%) $55.69
Image of Montane Fury Pants - Women's Montane Fury Pants - Women's List: $100.00 (Save 51%) $48.68 Blazin' Deal
Image of ScentLok ScentLok Womens ClimaFleece BaseSlayer Top 1409356 ScentLok ScentLok Womens ClimaFleece BaseSlayer Top 1409356 List: $89.99 $83.99
Image of ScentLok ScentLok Womens ClimaFleece BaseSlayer Top 1409355 ScentLok ScentLok Womens ClimaFleece BaseSlayer Top 1409355 List: $89.99 $83.99
Image of ScentLok ScentLok Womens ClimaFleece BaseSlayer Bottom 1409358 ScentLok ScentLok Womens ClimaFleece BaseSlayer Bottom 1409358 List: $89.99 $85.99
Image of ScentLok ScentLok Womens ClimaFleece BaseSlayer Bottom 1409359 ScentLok ScentLok Womens ClimaFleece BaseSlayer Bottom 1409359 List: $89.99 $83.99
Image of ScentLok ScentLok Womens ClimaFleece BaseSlayer Top 1409353 ScentLok ScentLok Womens ClimaFleece BaseSlayer Top 1409353 List: $89.99 $83.99
Image of ScentLok ScentLok Womens ClimaFleece BaseSlayer Bottom 1409360 ScentLok ScentLok Womens ClimaFleece BaseSlayer Bottom 1409360 List: $89.99 $83.99
Image of ScentLok ScentLok Womens ClimaFleece BaseSlayer Top ScentLok ScentLok Womens ClimaFleece BaseSlayer Top List: $89.99 $85.99
Image of ScentLok ScentLok Womens ClimaFleece BaseSlayer Bottom 1409361 ScentLok ScentLok Womens ClimaFleece BaseSlayer Bottom 1409361 List: $89.99 $83.99
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