Base Layers
Featured Brands
- Beta Tools®7992N Series Long-sleeved Technical Undershirt (079920005)7992N Series Long-sleeved Technical Undershirt (079920005) by Beta Tools®. Size: 2X-Large. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high...Made of 100% polyester, 130 g/m2Perfect blend of leading innovations and superior workmanship$43.45
- Beta Tools®7992N Series Long-sleeved Technical Undershirt (079920003)7992N Series Long-sleeved Technical Undershirt (079920003) by Beta Tools®. Size: Large. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level...Made of 100% polyester, 130 g/m2Perfect blend of leading innovations and superior workmanship$43.45
- Beta Tools®7992N Series Long-sleeved Technical Undershirt (079920004)7992N Series Long-sleeved Technical Undershirt (079920004) by Beta Tools®. Size: X-Large. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level...Made of 100% polyester, 130 g/m2Perfect blend of leading innovations and superior workmanship$43.45
- Beta Tools®7992N Series Long-sleeved Technical Undershirt (079920002)7992N Series Long-sleeved Technical Undershirt (079920002) by Beta Tools®. Size: Medium. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level...Made of 100% polyester, 130 g/m2Perfect blend of leading innovations and superior workmanship$43.45
- Rothco®Men's Gen III Level II 3X-Large Black Base Layer Top (69132-Black-3XL)Men's Gen III Level II 3X-Large Black Base Layer Top (69132-Black-3XL) by Rothco®. Reliable, warm mid-weight base layer ECWCS Gen III Level II Underwear Crew Top keeps your body heat in and the effects of extreme cold weather out. This...Grid fleece is part of level two of the Extended Cold Weather Clothing System specially designed for layering for military and tactical professionalsECWCS Gen III thermal underwear shirt is made with warm, breathable, and reliable materials$46.67
- Rothco®Men's Gen III Level II 3X-Large Coyote Brown Base Layer Top (69142-Coyote Brown-3XL)Men's Gen III Level II 3X-Large Coyote Brown Base Layer Top (69142-Coyote Brown-3XL) by Rothco®. Reliable, warm mid-weight base layer ECWCS Gen III Level II Underwear Crew Top keeps your body heat in and the effects of extreme cold...Grid fleece is part of level two of the Extended Cold Weather Clothing System specially designed for layering for military and tactical professionalsECWCS Gen III thermal underwear shirt is made with warm, breathable, and reliable materials$46.67
- Rothco®Men's Gen III Level II Large Black Base Layer Top (69130-Black-L)Men's Gen III Level II Large Black Base Layer Top (69130-Black-L) by Rothco®. Reliable, warm mid-weight base layer ECWCS Gen III Level II Underwear Crew Top keeps your body heat in and the effects of extreme cold weather out. This...Grid fleece is part of level two of the Extended Cold Weather Clothing System specially designed for layering for military and tactical professionalsECWCS Gen III thermal underwear shirt is made with warm, breathable, and reliable materials$43.61
- Rothco®Men's Gen III Level II Large Coyote Brown Base Layer Top (69140-Coyote Brown-L)Men's Gen III Level II Large Coyote Brown Base Layer Top (69140-Coyote Brown-L) by Rothco®. Reliable, warm mid-weight base layer ECWCS Gen III Level II Underwear Crew Top keeps your body heat in and the effects of extreme cold weather...Grid fleece is part of level two of the Extended Cold Weather Clothing System specially designed for layering for military and tactical professionalsECWCS Gen III thermal underwear shirt is made with warm, breathable, and reliable materials$43.61
- Rothco®Men's Gen III Level II Medium Black Base Layer Top (69130-Black-M)Men's Gen III Level II Medium Black Base Layer Top (69130-Black-M) by Rothco®. Reliable, warm mid-weight base layer ECWCS Gen III Level II Underwear Crew Top keeps your body heat in and the effects of extreme cold weather out. This...Grid fleece is part of level two of the Extended Cold Weather Clothing System specially designed for layering for military and tactical professionalsECWCS Gen III thermal underwear shirt is made with warm, breathable, and reliable materials$43.61
- Rothco®Men's Gen III Level II Medium Coyote Brown Base Layer Top (69140-Coyote Brown-M)Men's Gen III Level II Medium Coyote Brown Base Layer Top (69140-Coyote Brown-M) by Rothco®. Reliable, warm mid-weight base layer ECWCS Gen III Level II Underwear Crew Top keeps your body heat in and the effects of extreme cold weather...Grid fleece is part of level two of the Extended Cold Weather Clothing System specially designed for layering for military and tactical professionalsECWCS Gen III thermal underwear shirt is made with warm, breathable, and reliable materials$43.61
- Rothco®Men's Gen III Level II Small Black Base Layer Top (69130-Black-S)Men's Gen III Level II Small Black Base Layer Top (69130-Black-S) by Rothco®. Reliable, warm mid-weight base layer ECWCS Gen III Level II Underwear Crew Top keeps your body heat in and the effects of extreme cold weather out. This...Grid fleece is part of level two of the Extended Cold Weather Clothing System specially designed for layering for military and tactical professionalsECWCS Gen III thermal underwear shirt is made with warm, breathable, and reliable materials$43.61
- Rothco®Men's Gen III Level II Small Coyote Brown Base Layer Top (69140-Coyote Brown-S)Men's Gen III Level II Small Coyote Brown Base Layer Top (69140-Coyote Brown-S) by Rothco®. Reliable, warm mid-weight base layer ECWCS Gen III Level II Underwear Crew Top keeps your body heat in and the effects of extreme cold weather...Grid fleece is part of level two of the Extended Cold Weather Clothing System specially designed for layering for military and tactical professionalsECWCS Gen III thermal underwear shirt is made with warm, breathable, and reliable materials$43.61
- Rothco®Men's Gen III Level II X-Large Black Base Layer Top (69130-Black-XL)Men's Gen III Level II X-Large Black Base Layer Top (69130-Black-XL) by Rothco®. Reliable, warm mid-weight base layer ECWCS Gen III Level II Underwear Crew Top keeps your body heat in and the effects of extreme cold weather out. This...Grid fleece is part of level two of the Extended Cold Weather Clothing System specially designed for layering for military and tactical professionalsECWCS Gen III thermal underwear shirt is made with warm, breathable, and reliable materials$43.61
- Rothco®Men's Gen III Level II X-Large Coyote Brown Base Layer Top (69140-Coyote Brown-XL)Men's Gen III Level II X-Large Coyote Brown Base Layer Top (69140-Coyote Brown-XL) by Rothco®. Reliable, warm mid-weight base layer ECWCS Gen III Level II Underwear Crew Top keeps your body heat in and the effects of extreme cold...Grid fleece is part of level two of the Extended Cold Weather Clothing System specially designed for layering for military and tactical professionalsECWCS Gen III thermal underwear shirt is made with warm, breathable, and reliable materials$43.61
- Rothco®Men's Gen III Level II XX-Large Black Base Layer Top (69131-Black-2XL)Men's Gen III Level II XX-Large Black Base Layer Top (69131-Black-2XL) by Rothco®. Reliable, warm mid-weight base layer ECWCS Gen III Level II Underwear Crew Top keeps your body heat in and the effects of extreme cold weather out. This...Grid fleece is part of level two of the Extended Cold Weather Clothing System specially designed for layering for military and tactical professionalsECWCS Gen III thermal underwear shirt is made with warm, breathable, and reliable materials$45.14
- Rothco®Men's Gen III Level II XX-Large Coyote Brown Base Layer Top (69141-Coyote Brown-2XL)Men's Gen III Level II XX-Large Coyote Brown Base Layer Top (69141-Coyote Brown-2XL) by Rothco®. Reliable, warm mid-weight base layer ECWCS Gen III Level II Underwear Crew Top keeps your body heat in and the effects of extreme cold...Grid fleece is part of level two of the Extended Cold Weather Clothing System specially designed for layering for military and tactical professionalsECWCS Gen III thermal underwear shirt is made with warm, breathable, and reliable materials$45.14
- Rothco®Men's Performance Large Coyote Bown Boxers (3826-L)Men's Performance Large Coyote Bown Boxers (3826-L) by Rothco®. Stay cool and dry in Rothco's Moisture Wicking Performance Boxer Shorts. Constructed of 90% polyester and 10% spandex, these boxers are designed to move with you while...High Performance Polyester/Spandex Material For Maximum Comfort and SupportMoisture Wicking Technology Keeps you dry all day long$26.78
- Rothco®Men's Performance Medium Coyote Bown Boxers (3826-M)Men's Performance Medium Coyote Bown Boxers (3826-M) by Rothco®. Stay cool and dry in Rothco's Moisture Wicking Performance Boxer Shorts. Constructed of 90% polyester and 10% spandex, these boxers are designed to move with you while...High Performance Polyester/Spandex Material For Maximum Comfort and SupportMoisture Wicking Technology Keeps you dry all day long$26.78
- Rothco®Men's Performance Small Coyote Bown Boxers (3826-S)Men's Performance Small Coyote Bown Boxers (3826-S) by Rothco®. Stay cool and dry in Rothco's Moisture Wicking Performance Boxer Shorts. Constructed of 90% polyester and 10% spandex, these boxers are designed to move with you while...High Performance Polyester/Spandex Material For Maximum Comfort and SupportMoisture Wicking Technology Keeps you dry all day long$26.78
- Rothco®Men's Performance X-Large Coyote Bown Boxers (3826-XL)Men's Performance X-Large Coyote Bown Boxers (3826-XL) by Rothco®. Stay cool and dry in Rothco's Moisture Wicking Performance Boxer Shorts. Constructed of 90% polyester and 10% spandex, these boxers are designed to move with you while...High Performance Polyester/Spandex Material For Maximum Comfort and SupportMoisture Wicking Technology Keeps you dry all day long$26.78
- Rothco®Men's Performance XX-Large Coyote Bown Boxers (3827-2XL)Men's Performance XX-Large Coyote Bown Boxers (3827-2XL) by Rothco®. Stay cool and dry in Rothco's Moisture Wicking Performance Boxer Shorts. Constructed of 90% polyester and 10% spandex, these boxers are designed to move with you while...High Performance Polyester/Spandex Material For Maximum Comfort and SupportMoisture Wicking Technology Keeps you dry all day long$28.31
- Rothco®Men's Thermal 3X-Large Black Base Layer Top (2829)Men's Thermal 3X-Large Black Base Layer Top (2829) by Rothco®. Rothco's Knit Thermal Midweight Top offers exceptional warmth and comfort. From the trail to the city, this top will keep you warm in the coldest months fall and winter have...Lightweight, Breathable, and warm for ultimate comfortPolyester/Cotton blend Performance Material$34.43
- Rothco®Men's Thermal Large Black Base Layer Top (2827-L)Men's Thermal Large Black Base Layer Top (2827-L) by Rothco®. Rothco's Knit Thermal Midweight Top offers exceptional warmth and comfort. From the trail to the city, this top will keep you warm in the coldest months fall and winter have...Lightweight, Breathable, and warm for ultimate comfortPolyester/Cotton blend Performance Material$32.90
- Rothco®Men's Thermal Medium Black Base Layer Top (2827-M)Men's Thermal Medium Black Base Layer Top (2827-M) by Rothco®. Rothco's Knit Thermal Midweight Top offers exceptional warmth and comfort. From the trail to the city, this top will keep you warm in the coldest months fall and winter have...Lightweight, Breathable, and warm for ultimate comfortPolyester/Cotton blend Performance Material$32.90
- Rothco®Men's Thermal Small Black Base Layer Top (2827-S)Men's Thermal Small Black Base Layer Top (2827-S) by Rothco®. Rothco's Knit Thermal Midweight Top offers exceptional warmth and comfort. From the trail to the city, this top will keep you warm in the coldest months fall and winter have...Lightweight, Breathable, and warm for ultimate comfortPolyester/Cotton blend Performance Material$32.90
- Rothco®Men's Thermal X-Large Black Base Layer Top (2827-XL)Men's Thermal X-Large Black Base Layer Top (2827-XL) by Rothco®. Rothco's Knit Thermal Midweight Top offers exceptional warmth and comfort. From the trail to the city, this top will keep you warm in the coldest months fall and winter...Lightweight, Breathable, and warm for ultimate comfortPolyester/Cotton blend Performance Material$32.90
- Rothco®Men's Thermal XX-Large Black Base Layer Top (2828)Men's Thermal XX-Large Black Base Layer Top (2828) by Rothco®. Rothco's Knit Thermal Midweight Top offers exceptional warmth and comfort. From the trail to the city, this top will keep you warm in the coldest months fall and winter have...Lightweight, Breathable, and warm for ultimate comfortPolyester/Cotton blend Performance Material$33.66
- Under Armour®Packaged Base 3.0 Crew Scent Control Long Sleeve Shirt (2X-Large, Black) (1343243-001-XXL)Packaged Base 3.0 Crew Scent Control Long Sleeve Shirt (1343243-001-XXL) by Under Armour®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high...Perfect to create a memorable lifetime experienceMade in compliance with high standards of safety$42.84
- Under Armour®Packaged Base 3.0 Crew Scent Control Long Sleeve Shirt (Large, Black) (1343243-001-LG)Packaged Base 3.0 Crew Scent Control Long Sleeve Shirt (1343243-001-LG) by Under Armour®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level...Perfect to create a memorable lifetime experienceMade in compliance with high standards of safety$42.84
- Under Armour®Packaged Base 3.0 Crew Scent Control Long Sleeve Shirt (Medium, Black) (1343243-001-MD)Packaged Base 3.0 Crew Scent Control Long Sleeve Shirt (1343243-001-MD) by Under Armour®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level...Perfect to create a memorable lifetime experienceMade in compliance with high standards of safety$42.84
The ‘onion principle’, also known as layering, is widely used by winter sportsmen, adventurers, anglers and hunters, and anyone practicing outdoor activities. The underlying idea is to coordinate various layers of clothing to get the most in terms of comfort and performance. In a nutshell, it means staying comfortable regardless of the weather and achieving your goal without freezing or feeling too hot. The ideal thermal wear consists of three layers, each with specific characteristics and interacting with the others to ensure optimal body temperature and moisture wicking properties. The grounding of the layering system is the first, or base layer that is in direct contact with the skin.
When choosing a base layer, consider three aspects: fabrics, weight, and fit. Typically, there are synthetic or Merino wool materials used. Both types provide quality performance in terms of removing moisture and retaining heat. Hence, the choice is personal. The weight depends on the outdoor conditions and how your body reacts to cold temperatures, sweat, etc. The fit is essential. The layer should adhere to the skin without being too tight. We provide a vast assortment of top-notch base layers, including tops, pants, and underwear designed by leading companies and offered at affordable prices.