Custom Thermal Base Layer Bottoms
Insulating thermal bottoms designed to be worn under work pants, ski pants, and heated pants. Merino wool and synthetic options for cold-weather teams. Custom branded worldwide.
Thermal Bottom Styles
Three base layer formats for different cold-weather conditions. Each is designed to layer under work pants, ski pants, or heated pants.
Merino Wool Thermal Bottoms
100% merino wool with natural temperature regulation. Elastic waist for all-day comfort. The premium choice for extended outdoor wear in freezing conditions.
Synthetic Thermal Bottoms
Polyester microfleece with quick-drying performance. Reinforced knees for durability. The workhorse option for active teams that need fast moisture management.
Silk-Weight Thermal Bottoms
Polyester-silk blend with ultra-lightweight construction. Second-skin fit for seamless layering. The minimal-bulk option when you need warmth without restriction.
Thermal Bottom Specifications
Side-by-side comparison of all three thermal bottom styles to help you choose the right fabric for your team.
| Feature | Merino | Synthetic | Silk-Weight |
|---|---|---|---|
| Material | Merino Wool | Polyester Microfleece | Poly-Silk |
| Weight | 220g | 200g | 160g |
| Warmth | High | Medium | Light |
| Odor Resistant | Yes | No | No |
| Quick Dry | Moderate | Fast | Fast |
| Best For | Extended wear | Active work | Layering |
Industries We Serve
Thermal bottoms for teams that work and play in cold environments, high altitudes, or extended outdoor shifts.
Why Choose RB Tshirt & Advertising
We combine thermal fabric technology with custom branding for industrial and outdoor teams worldwide.
Thermal Technology
Merino wool, polyester microfleece, and poly-silk blends engineered for maximum warmth-to-weight ratio. Each fabric is tested for thermal retention and moisture management.
Custom Branding
Your company logo embroidered, DTF printed, or heat-transferred on every pair of thermal bottoms. Full-color branding on the waistband, thigh, or hem.
Global Shipping
We ship custom thermal bottoms worldwide with competitive FOB pricing. Volume discounts for mining companies, ski resorts, and fleet operators ordering 100+ pieces.
Custom Thermal Base Layer Bottoms
Thermal bottoms keep legs warm under work pants, ski pants, and heated pants. Our range covers merino wool, synthetic fleece, and silk-weight options for different warmth levels and activities.
Merino Wool Thermal Bottoms
100% merino wool with natural temperature regulation and odor resistance. Elastic waist for comfortable fit. Weight: 220 grams. The premium choice for extended cold-weather work.
Synthetic Thermal Bottoms
Polyester microfleece with reinforced knees for durability. Quick-drying and machine washable. Weight: 200 grams. The practical choice for construction and mining crews.
Silk-Weight Thermal Bottoms
Polyester-silk blend with ultra-lightweight second-skin fit. Ideal under heated pants or ski gear. Weight: 160 grams. The minimalist choice for teams that need warmth without bulk.
Custom Branding
All thermal bottoms support embroidery and heat-transfer printing. Custom color matching for team colors. Mix sizes freely across orders.
Frequently Asked Questions
Quick answers about ordering custom thermal base layer bottoms.
What fabric composition are the thermal bottoms?
We offer three fabric options: 100% merino wool (220g), polyester microfleece (200g), and a polyester-silk blend (160g). Each is selected for specific cold-weather performance characteristics.
How warm are the thermal bottoms?
Merino wool provides the highest warmth rating and is best for extended wear in freezing conditions. Synthetic microfleece offers medium warmth for active work. Silk-weight provides light insulation ideal for layering under heated pants.
What sizes are available?
Thermal bottoms are available in sizes XS through 4XL. We also offer custom sizing for bulk orders. Contact us with your team's measurements for a tailored fit.
Are the thermal bottoms machine washable?
Yes. Synthetic and silk-weight thermal bottoms are fully machine washable. Merino wool options should be washed on a gentle cycle with cold water to preserve the natural fiber properties.
What is the minimum order quantity?
We handle orders from 1 piece up to bulk. Pricing is most competitive at 100+ pieces. Contact us for a custom quote based on your team size and fabric selection.
Where can you place our logo on the thermal bottoms?
We can embroider, DTF print, or heat-transfer your logo on the waistband, thigh area, or hem. We create a free digital mockup before production so you can approve the design and placement.
Browse Base Layers
Pick the base layer that fits your team. Every option is fully customizable with your company logo.
All Base Layers
Browse tops, bottoms, and compression gear. Full base layer line for cold-weather teams.
View AllThermal Tops
Long-sleeve thermal tops in merino, synthetic, and silk-weight. Pair with thermal bottoms for full coverage.
View TopsCompression Tops
Performance compression tops for active work. Moisture-wicking and muscle support for high-output teams.
View TopsCompression Bottoms
Compression tights and leggings for athletic and industrial use. Muscle support and recovery for active teams.
View BottomsContact Us for Thermal Bottom Quotes
Send your team size, fabric preference, and logo file. Our base layer team replies with itemized pricing and free digital mockup within 2 hours.
2-hour mockup + quote SLA for thermal bottom inquiries.