---
product_id: 232926609
title: "Men's Classic Thermal Merino Base Layer Bottom"
brand: "smartwool"
price: "S$216"
currency: SGD
in_stock: true
reviews_count: 9
category: "Smartwool"
url: https://www.desertcart.sg/products/232926609-mens-classic-thermal-merino-base-layer-bottom
store_origin: SG
region: Singapore
---

# 100% Merino Wool for natural warmth Flatlock seams minimize chafing Midweight thermal fabric for cold weather Men's Classic Thermal Merino Base Layer Bottom

**Brand:** smartwool
**Price:** S$216
**Availability:** ✅ In Stock

## Summary

> ❄️ Elevate your cold-weather game with Smartwool’s sleek, warm, and sustainable base layer!

## Quick Answers

- **What is this?** Men's Classic Thermal Merino Base Layer Bottom by smartwool
- **How much does it cost?** S$216 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/232926609-mens-classic-thermal-merino-base-layer-bottom)

## Best For

- smartwool enthusiasts

## Why This Product

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

## Key Features

- • **Sleek Slim Fit Design:** Show off a modern silhouette without sacrificing freedom of movement on any adventure.
- • **Chafe-Free Performance:** Flatlock seams ensure irritation-free wear during long outdoor excursions.
- • **Engineered for Layering:** 3/4 bottom length reduces bulk and friction inside boots for seamless layering.
- • **Sustainably Made in the USA:** Feel good about your gear with eco-conscious craftsmanship and inclusive values.
- • **Ultimate Cold-Weather Comfort:** Stay warm and dry with breathable Merino wool that wicks moisture away effortlessly.

## Overview

Smartwool Men's Classic Thermal Merino Base Layer Bottoms are crafted from 100% midweight Merino wool, designed in the USA for superior warmth, breathability, and moisture management. Featuring a slim fit with flatlock seams and a 3/4 length to reduce bulk, these base layers are perfect for cold-weather outdoor activities like skiing and hiking. Highly rated for comfort and durability, they combine technical performance with sustainable production values.

## Description

Buy SmartWool SW016361001XL Men's Merino 250 Baselayer Bottom Black XL: Active Base Layers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Good quality - Good quality and comfortable it keeps me warm in the cold days specially I work outdoors. A bit pricy but I think it’s worth it.
Review: Great start to keeping your lower body warm - These are great for layering in cold weather. I can't tolerate being cold, so I wear them all the time!

## Features

- 100% Merino Wool
- Made in the USA
- COLD WEATHER BASE LAYER. Keep your ski or hiking boots free of bulk and friction with our 3/4 Bottom. Merino wool provides ultimate comfort, while a newly redesigned base layer pants fit helps reduce sag and excess fabric—perfect for layering.
- SLIM FIT. Designed to meet the demands of outdoor adventuring, these slim fit bottoms show off a slimming silhouette while offering unrestricted movement through the legs. Inseam: 21.5"
- CLASSIC THERMAL MERINO. Ideal for cold-weather activities where warmth and breathability are crucial, this midweight fabric used a Merino wool construction that helps move moisture away from skin to keep you warm and dry.
- FUNCTIONAL FEATURES. Go far, feel good with thoughtful tech to keep you trekking comfortably — interlock knitting enhances breathability, thermoregulation and moisture-wicking while flatlock seams minimize chafing for greater comfort.
- GO FAR. FEEL GOOD. From wool socks to base layers for men, women and kids, we aim to provide the highest quality apparel for your outdoor adventures with a commitment to environmental sustainability, racial equity and inclusivity.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B083QD5MJQ |
| Best Sellers Rank | #21,179 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #25 in Men's Base Layers |
| Brand Name | Smartwool |
| Color | Black |
| Customer Reviews | 4.6 4.6 out of 5 stars (605) |
| Date First Available | March 4, 2020 |
| Item Dimensions LxWxH | 5 x 4 x 2 inches |
| Item Package Dimensions L x W x H | 9.45 x 7.76 x 1.97 inches |
| Item Weight | 2 Ounces |
| Manufacturer | Smartwool |
| Material | Wool |
| Model Name | Merino 250 Base Layer Bottoms |
| Number of Items | 1 |
| Package Weight | 0.33 Kilograms |
| Part Number | SW016361001-XL |
| Size | X-Large |
| Sport Type | Multi-Sport |
| Style | Merino 250 Base Layer Bottoms |
| Suggested Users | mens, unisex-adult |

## Images

![Men's Classic Thermal Merino Base Layer Bottom - Image 1](https://m.media-amazon.com/images/I/41TzA+ljY-L.jpg)

## Available Options

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

## Questions & Answers

**Q: Size Why should I order with a 32 inch waist and a 34 inch out seemWhen ordering smart wool men’s pants**
A: I am 6"1 34 waist medium was perfect fit.

**Q: what size should I order to man 6'3" 175 pounds 35" waist?  And do smartwool men's bottoms come in light weight, medium and heavy?  Thank you**
A: Hi there, 
a medium accommodates up to a 34'' waist, and a size large accommodate a size 35'' waist to 37''.

**Q: I have a 27" waist and a 36" inseam.  which size pants and shirts should i order? ps, i'm female but no one has my inseam it seams.**
A: I have a 31" waist and 31" inseam.  The men's Medium size fits me well.  Good luck from Seattle

**Q: are these good for working out in the garage or doing yard work when it's about 50 degrees?**
A: They are very comfortable, so I do not see why they would not work well under those conditions. I wore these for extra warmth walking many miles throughout Japan in November of 2022. The temperature in the morning was around 45F to 54F.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good quality
*by A***M on January 3, 2026*

Good quality and comfortable it keeps me warm in the cold days specially I work outdoors. A bit pricy but I think it’s worth it.

### ⭐⭐⭐⭐⭐ Great start to keeping your lower body warm
*by W***K on December 31, 2025*

These are great for layering in cold weather. I can't tolerate being cold, so I wear them all the time!

### ⭐⭐⭐⭐⭐ Worth the $$
*by L***H on January 15, 2026*

So comfortable; looking forward to being in below freezing with these on!

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**Shop now:** [https://www.desertcart.sg/products/232926609-mens-classic-thermal-merino-base-layer-bottom](https://www.desertcart.sg/products/232926609-mens-classic-thermal-merino-base-layer-bottom)

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-03-20*