---
product_id: 177857733
title: "Carhartt Men's MBL121 Base Force® Heavyweight Base Layer Poly-Wool Bott"
brand: "carhartt"
price: "81719CFA"
currency: XOF
in_stock: true
reviews_count: 13
category: "Carhartt"
url: https://www.desertcart.sn/products/177857733-carhartt-mens-mbl121-base-force-heavyweight-base-layer-poly-wool
store_origin: SN
region: Senegal
---

# FastDry tech wicks sweat Merino-synthetic wool blend warmth Durable flatlock seams Carhartt Men's MBL121 Base Force® Heavyweight Base Layer Poly-Wool Bott

**Brand:** carhartt
**Price:** 81719CFA
**Availability:** ✅ In Stock

## Summary

> ❄️ Gear up in Carhartt Base Force® — where warmth meets unstoppable performance!

## Quick Answers

- **What is this?** Carhartt Men's MBL121 Base Force® Heavyweight Base Layer Poly-Wool Bott by carhartt
- **How much does it cost?** 81719CFA with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/177857733-carhartt-mens-mbl121-base-force-heavyweight-base-layer-poly-wool)

## Best For

- carhartt enthusiasts

## Why This Product

- Trusted carhartt brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Heavyweight poly-wool fabric with reinforced flatlock seams resists wear and chafing.
- • **Layer Like a Pro:** Ideal base layer for cold-weather work or outdoor adventures—warmth without bulk.
- • **Next-Level Comfort:** Soft merino wool blend that’s odor-resistant and temperature regulating for all-day freshness.
- • **Stay Dry, Stay Warm:** Force technology rapidly wicks moisture to keep you comfortable all day.
- • **Perfect Fit, Zero Distraction:** Contoured front with fly and tagless labels for seamless comfort under any gear.

## Overview

The Carhartt Men's MBL121 Base Force® Heavyweight Base Layer Pants combine advanced Force technology with a durable synthetic-merino wool blend to deliver superior moisture-wicking, odor resistance, and temperature regulation. Designed with flatlock seams and a contoured fit, these base layers provide long-lasting comfort and durability for cold-weather work or outdoor activities.

## Description

Gear up for cold-weather work with Midweight Synthetic-Merino Wool Blend Base Layer Pants. Built for performance and comfort, these long john bottoms combine merino wool’s natural warmth and moisture-wicking ability with synthetic fibers for durability and fast drying. Perfect for layering under work pants, overalls, or coveralls, these thermal underwear will keep you warm, dry, and odor-free all day.

Review: Last longer than Merino wool - I recently purchased the Carhartt Men's Force Midweight Synthetic-Wool Blend Base Layer lowers and upper, and I have to say, I’m really impressed with it! After wearing it for about a month, I’m very satisfied with both the quality and comfort. I tested these while hunting and while at work. The blend of synthetic and wool material provides a great balance of warmth and breathability, making it perfect for those cooler days. The fit is spot on, it's snug enough to keep me warm without feeling restrictive, and it holds up really well throughout the day. The fabric is soft against the skin and doesn’t itch like some other wool blends I’ve tried in the past. I also love how moisture-wicking it is. Whether I’m working hard outdoors or just running errands, it keeps me dry and comfortable. Carhartt's reputation for durability definitely holds up with this base layer; it feels built to last. I haven't noticed any pilling or wear even after a month of consistent use, which is a huge plus. I’m looking forward to seeing how it holds up over the long term, but so far, it's been an excellent purchase. Highly recommend it for anyone looking for a high-quality, comfortable base layer that can handle whatever you throw at it.
Review: Works great! - I got this product because I am constantly outside for work in the winter. I have had it for 3 years and it still feels comfortable, doesn’t have any holes so it’s durable. It functions great in keeping me warm, but is breathable enough when moving around to not get too how. I have worn it under my putter coat when offshore fishing during the winter as well as kept me warm while up in the mountains material is great, durable, and thick enough to keep warm but thin enough to not overheat. Glad I spent the money on this and looks good too!

## Features

- Built with Force technology to wick sweat and dry fast; FastDry wicks away sweat
- Moisture-wicking, odor resistant, and temperature regulating wool blend
- Strategically placed flatlock seams reduce chafing
- Brushed elastic waistband
- Contoured front with fly; tagless labels

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN  | B0BMT1H3SY |
| Best Sellers Rank | #39,778 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #46 in Men's Thermal Underwear Bottoms |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,751) |
| Date First Available  | August 10, 2021 |
| Department  | mens |
| Item model number  | UM0121 |
| Manufacturer  | Carhartt |

## Images

![Carhartt Men's MBL121 Base Force® Heavyweight Base Layer Poly-Wool Bott - Image 1](https://m.media-amazon.com/images/I/712tJ98Lz9L.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Last longer than Merino wool
*by A***R on January 30, 2025*

I recently purchased the Carhartt Men's Force Midweight Synthetic-Wool Blend Base Layer lowers and upper, and I have to say, I’m really impressed with it! After wearing it for about a month, I’m very satisfied with both the quality and comfort. I tested these while hunting and while at work. The blend of synthetic and wool material provides a great balance of warmth and breathability, making it perfect for those cooler days. The fit is spot on, it's snug enough to keep me warm without feeling restrictive, and it holds up really well throughout the day. The fabric is soft against the skin and doesn’t itch like some other wool blends I’ve tried in the past. I also love how moisture-wicking it is. Whether I’m working hard outdoors or just running errands, it keeps me dry and comfortable. Carhartt's reputation for durability definitely holds up with this base layer; it feels built to last. I haven't noticed any pilling or wear even after a month of consistent use, which is a huge plus. I’m looking forward to seeing how it holds up over the long term, but so far, it's been an excellent purchase. Highly recommend it for anyone looking for a high-quality, comfortable base layer that can handle whatever you throw at it.

### ⭐⭐⭐⭐⭐ Works great!
*by P***K on October 29, 2024*

I got this product because I am constantly outside for work in the winter. I have had it for 3 years and it still feels comfortable, doesn’t have any holes so it’s durable. It functions great in keeping me warm, but is breathable enough when moving around to not get too how. I have worn it under my putter coat when offshore fishing during the winter as well as kept me warm while up in the mountains material is great, durable, and thick enough to keep warm but thin enough to not overheat. Glad I spent the money on this and looks good too!

### ⭐⭐⭐⭐⭐ It's a gift
*by B***S on November 30, 2024*

And it's a gift worth giving, as Carhartt makes a good product on everything. He wears Carhartt everything as it's his 'go to.' While there are less expensive long underwear for base layers, the fact that Carhartt has 19% wool in them is what sold me. There is nothing at all like wool to retain heat - no fancy "fabrics" of any sort - and that these are also washable/dryable is amazing. He will be happy I am sure.

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**Shop now:** [https://www.desertcart.sn/products/177857733-carhartt-mens-mbl121-base-force-heavyweight-base-layer-poly-wool](https://www.desertcart.sn/products/177857733-carhartt-mens-mbl121-base-force-heavyweight-base-layer-poly-wool)

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*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-02-14*