Best Thermal Base Layer Shirt for Men 2021

The best base layer shirt help to keep workers and hunters warm during the harsh winter months and working in cold conditions. When working outside, hunting, fishing or in an occupation in cold conditions employees require the correct layers to handle the colder conditions.

We look at the Best Thermal Base Layers for men for winter working outdoors and in cold conditions.

For thermal pants check out the best men’s base layer pants.

Our top-rated Men’s Thermal Base Layer Shirt : We liked the Carhatt Men’s Force Midweight Classic Thermal Base Layer

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Thermal Base Layer Shirt for Men Comparison

Thermal Base LayerSizesMaterials
Carhartt Men’s Force Midweight Classic S – 4XL100% Polyester
MERIWOOL Mens Base LayerS- 2XL100% Merino Wool
Under Armour Men’s ColdGear Mock Long-Sleeve ShirtS – 4XL87% Polyester,
13% Elastane
Columbia Omni-Heat Midweight Baselayer S – 2XL85% polester,
15% Elastane
Amazon Essentials Men’s Lightweight Performance Long-Sleeve XS – 2XL36% Polyester,
30% Rayon,
30% Acrylic,
4% Spandex

1. Carhartt Men’s Force Midweight Classic Thermal Base Layer

The top of our choice for men’s thermal base layer is designed to keep you warm whilst working but comfortable enough to move freely.

Available in a variety of in 5 different colours it is a quality thermal base layer.

They are rugged and durable and ideal for manual workers during the winter months. Construction, highways employees, hunters, fisherman those who commute, work and leisure outdoors.

The fast dry material wicks sweat away from the body and dries really fast and fights odors. This helps ensure that body temperature is regulated.

The main features of the Carhartt Men’s Force Midweight Classic Thermal Base Layer:

  • Tough and Lightweight .
  • Classic waffle knit traps heat to keep core warm
  • Rugged flex construction allows good movement
  • The fast dry material wicks sweat away
  • Seams have been positioned away from areas of high abrasion.

The base layer are comfortable and lightweight enough to wear under your regular clothing to keep you warm but not getting too hot..

If you are involved in construction or manufacturing this is a great choice as it is designed to withstand the movements you are exposed to daily. It also has smooth flatlock seams, tagless labels and the fit is comfortable.

Carhatt are known for their great quality work and recreation wear and are often found on our review lists.

2. MERIWOOL Mens Base Layer – Midweight Long Sleeve Shirt

If you are looking for a warm body base layer then these 100% Merino thermal wool shirts are a great option. It is also smart enough to wear on its own. This option is a crew neck top available in sizes small to 2XL.

Made with super soft natural Merino wool. Merino wool is grown on Merino sheep and their wool is thinner and softer than regular wool. This ensures that it doesn’t irritate the skin whilst keeping your body warm during winter months and cool during summer months.

The wool helps to regulate the body temperature whilst transporting sweat away from the legs. It also fights body odors and smells.

The benefits of wearing Merino wool is that it ensures that they can be worn in winter months whilst working, moving and hunting and they will keep you comfortable.

The Meriwool Men’s Base Layer Midweight Shit features:

  • Available in 9 different colors
  • Made with Non itch 18.5 micron Merino wool
  • Breathable and lightweight
  • Wicks sweat away
  • 1-year manufacturers warranty

We liked these thermal shirt base layers. Not only are they comfortable warming layer they are made from natural products.

3. Under Armour Men’s ColdGear Mock Long-Sleeve Shirt

The under armour thermal long sleeve shirt is ideal for working or recreational use in cold weather conditions.

The materials used are ideal for manual movements that are carried out when working outdoors. This means that the fabric will keep you warm whilst any sweat is wicked away from the body whilst keepoing you dry.

The fabrics are anti odour which prevent microbes from producing unpleasant body smells.

The material is manufactured to allow 4-way stretch that allows the body to move in all directions without feeling restricted.

The main features of Under Armour Men’s ColdGear Armour Compression Mock Long-Sleeve T-Shirt:

  • Dual layer fabric
  • Keeps body warm
  • Wickes swaet away by drying fast
  • Anti odor
  • Chafe free smooth flat seams

The shirt is deigned to be a snug fit that is worn under other layers

Under armour have a great reputation for their sports and leisure wear and this compression style thermal base layer is no exception. It will definitely keep you warm as part of a layered approach to your workwear.

4. Columbia Omni-Heat Mens Midweight Stretch Baselayer Long Sleeve Shirt

These mid-weight thermal base layer shirts are available in three different colours.

They are available in sizes small to XXL

The material blend ensures that moisture levels remain low with anti wick properties.

These base layers are made with a blend that allows a soft touch but remain durable. They are mid-weight double layer thermal that will keep you warm in cold weather for work, hunting or recreation.

The baselayer is tag-free for comfort and are made with no-chafe flatlock seams.

Features of Columbia Omni-Heat Men’s Midweight Base Layer:

  • Ergonomic closure
  • Wicks Sweat Away
  • Everyday Warmth
  • 4 way comfort stretch
  • Durable

These Columbia Thermal baselayers ideal for workers in construction, manufacturing and those partaking in outdoor activities such as hunting and hiking. They will keep you warm whilst allowing free movement.

They are built to withstand general wear and tear that you may be encountered with.

5. Amazon Essentials Men’s Lightweight Performance Base Layer Long Sleeve Shirt

Amazon produce their own brand essential baselayers for men.

These thermal baselayers keep you warm at a good price. Ideal for wearing under your regular work, hunting and recreation wear..

The base layer is made from a mixture blend of 36% Polyester, 30% Rayon, 30% Acrylic, 4% Spandex

Amazon Essentials Men’s Lightweight Performance Base Layer:

  • Slim Fit. Fits close to the body.
  • Designed to be worn under regular clothing
  • Lightweight ensures you remain comfortable when working
  • Moisture wicking
  • Retains heat

The sizing on these baselayers was probably a bit optimistic. We went for a size up and that fitted perfectly.

A durable cost effective way of keeping warm. Amazon listen to feedback from customers to fine tune their products over time. This ensures that when you buy you are buying the best version you can.


Keeping warm whilst working outside during the harsh winter months is the number one priority. By being comfortable it enables you to work better without feeling cold and tensing the body. Cold affects people mentally and physically so keeping a good temperature increases productivity and improves morale.

Using base layer under normal work gear or waterproof gear enables workers, hunters, hikers and joggers to cope for longer as they are equipped to tackle wind, snow and ice.

Further Reading

The Toughest Men’s Work Pants

The Best Base Layer Pants for Men

The Best Winter Work Gloves

The Best Work Waterproof Pants

The Best Waterproof Steel Toe Boots

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