---
product_id: 256365919
title: "100% Merino Wool Base Layer Mens Pants - Thermal Underwear Long Johns"
brand: "merino.tech"
price: "S$125"
currency: SGD
in_stock: true
reviews_count: 13
category: "Merino.Tech"
url: https://www.desertcart.sg/products/256365919-100-merino-wool-base-layer-mens-pants-thermal-underwear-long
store_origin: SG
region: Singapore
---

# Includes premium Merino wool hiking socks ($21 value) 100% superfine 17.5 micron Merino wool Midweight 250 g/m² for perfect thermal regulation 100% Merino Wool Base Layer Mens Pants - Thermal Underwear Long Johns

**Brand:** merino.tech
**Price:** S$125
**Availability:** ✅ In Stock

## Summary

> 🧶 Stay warm, fresh, and unstoppable in 100% Merino luxury.

## Quick Answers

- **What is this?** 100% Merino Wool Base Layer Mens Pants - Thermal Underwear Long Johns by merino.tech
- **How much does it cost?** S$125 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/256365919-100-merino-wool-base-layer-mens-pants-thermal-underwear-long)

## Best For

- merino.tech enthusiasts

## Why This Product

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

## Key Features

- • **Effortless Care:** Machine washable and dryer safe for hassle-free maintenance and durability.
- • **Thermal Mastery:** Midweight 250 g/m² fabric balances warmth and moisture control for year-round wear.
- • **Bonus Socks Included:** Step up your layering game with premium Merino hiking socks, a $21 value gift.
- • **Odor-Resistant Freshness:** Natural Merino wool wicks moisture and fights odor, keeping you dry and confident.
- • **All-Day Comfort, Zero Itch:** Superfine Merino wool ensures softness and breathability without irritation.

## Overview

These men's base layer pants are crafted from 100% superfine Merino wool (17.5 micron) with a midweight 250 g/m² fabric that naturally regulates temperature and wicks moisture. Designed for all-day comfort without itch, they include a bonus pair of Merino wool hiking socks and are machine washable for easy care. Perfect for cold climates and active lifestyles, these long johns deliver premium warmth, odor resistance, and durability backed by the Merino.tech Promise.

## Description

Buy 100% Merino Wool Base Layer Mens Pants - Thermal Underwear Long Johns (Medium, Charcoal Grey 250) and other Bottoms at desertcart.com. Our wide selection is elegible for free shipping and free returns.

Review: Warm - Bought these as a Christmas gift. Husband loves them, wore them all winter long and the added pair of socks were a great bonus one of his favorite pairs! Super soft, very warm. Only complaint is they get peely after washing but they are an under layer so it doesn’t matter.
Review: Excellent comfort while keeping you warm, designed for men. - Wore these while ocean fishing in Alaska. Fantastic product. Keep me warm through three days of rainy and cold weather without hindering my movement. Most importantly it has a fly which for some reason many competitors products do not. I am 6’2” tall and weigh 208 lbs and extra large fit well.

## Features

- Midweight: Mens Merino Base Layer Available in: Lightweight 165 g/m², Midweight 250 g/m², Heavyweight 320 g/m². Merino Wool Hiking Socks ($21 Value!) - Midweight Merino Wool Pants for Men 250 g/m² and Wool Socks. Cool Packaging! Makes A Great Gift!
- Super Soft & Comfortable: 100% Superfine 17.5 Micron Merino Wool Underwear Mens provide all day comfort and no itch! Designed for daily wear without rubbing and overheating of regular cotton.
- Moisture Wicking & Odor Resistant: Merino long underwear mens natural wicking and odor-resistant properties allow it to absorb moisture better than any other fabric, keeping you dry and fresh.
- Easy Care: Washer/dryer safe. For longer lasting wear, hand wash and air dry. Midweight Merino Wool Base Layer Mens naturally regulates body temperature to keep you comfortable all year round.
- Zero Worries: Every Merino.tech Merino pants thermals for men we make is backed by our Merino.tech Promise - ensuring you're 100% happy with every Merino.tech purchase.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08JVLKFCD |
| Age Range Description | Adult |
| Apparel Closure Orientation | Front |
| Apparel Closure Type | Pull On |
| Apparel Fabric Stretch | Medium Stretch |
| Apparel Fabric Weight Class | Medium Weight |
| Apparel Occasion and Lifestyle | Outdoor |
| Best Sellers Rank | #21,434 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #4 in Men's Thermal Underwear Bottoms |
| Brand Name | Merino.tech |
| Care instructions | Machine Wash (Delicate Cycle), Hand Wash Recommended |
| Closure type | Pull On |
| Color | . Charcoal Grey 250 |
| Customer Reviews | 4.6 out of 5 stars 3,582 Reviews |
| Fabric Stretchability | Stretchable |
| Fabric Type | 100% Superfine Merino Wool |
| Fabric type | 100% Superfine Merino Wool |
| Fit Type | Standard |
| Fit to Size Sentiment | Fits True To Size |
| Front Pleat Type | Flat Front |
| Garment Size Country | United States |
| Import Designation | Imported |
| Item Length Description | Standard Length |
| Leg Style | Skinny |
| Manufacturer Part Number | MP-250 |
| Material Type | 100% Superfine Merino Wool |
| Model Name | Men Pants |
| Number of Items | 1 |
| Occasion Type | Hiking |
| Origin | Imported |
| Pants Form Type | Leggings |
| Pattern | Solid |
| Pattern Style | Solid |
| Pocket Description | No Pocket |
| Product Care Instructions | Machine Wash (Delicate Cycle), Hand Wash Recommended |
| Rise Style | Mid Rise |
| Seasons | All |
| Sleeve Length Description | Sleeveless |
| Specific Uses For Product | Hiking, Sports, Yoga |
| Sport Type | Hiking, Snow Skiing, Snowboarding, Camping and Hiking, Running, Climbing, Mountaineering, Cycling |
| Style Name | Modern/Fitted |
| Style Number | MP-250 |
| Team Name | Sports |
| Ultraviolet Protection Factor | UPF 50 |
| Unit Count | 1 Count |
| Waist Size | 33 inches |
| Weave Type | Knit |

## Images

![100% Merino Wool Base Layer Mens Pants - Thermal Underwear Long Johns - Image 1](https://m.media-amazon.com/images/I/61deebLwCVL.jpg)

## Available Options

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

## Questions & Answers

**Q: Won't merino wool feel itchy? And what does 17.5 micron mean?**
A: 17.5 micron superfine merino fibers are finer than human hair — too fine to feel itchy, even on sensitive skin. Standard wool (25+ microns) causes irritation; this doesn't. OEKO-TEX certified, tested against 100+ harmful substances.

**Q: How do I wash and dry it to keep it looking new ? Will it shrink or lose shape?**
A: Machine wash cold max 30°C, delicate cycle, inside out. Lay flat to dry — tumble drying permanently damages merino fibers. Store clean and dry; keep merino in sealed bags to prevent moths. Wear 3–5 days between washes — merino resists odor naturally

**Q: Which weight should I choose — 165, 250, or 320 g/m²?**
A: 165 g/m² — active pursuits, travel, spring/summer, 40–60°F. 250 g/m² — cold weather, most outdoor activities, 25–45°F. 320 g/m² — frost and low activity, 10–35°F, extreme conditions. Rule: the higher the activity level — the lighter the weight.

**Q: Where does the merino wool sourced from and is this product certified?**
A: Our products are made from Australian merino wool, RWS certified — independent farm audit confirming animal welfare and land management standards. Every component tested against 100+ harmful substances under OEKO-TEX Standard 100.

**Q: Does it fit true to size?**
A: Choose your regular size. For a snug layering fit under jackets or ski gear, size down one

## Customer Reviews

### ⭐⭐⭐⭐⭐ Warm
*by S***B on July 21, 2026*

Bought these as a Christmas gift. Husband loves them, wore them all winter long and the added pair of socks were a great bonus one of his favorite pairs! Super soft, very warm. Only complaint is they get peely after washing but they are an under layer so it doesn’t matter.

### ⭐⭐⭐⭐⭐ Excellent comfort while keeping you warm, designed for men.
*by B***. on June 21, 2026*

Wore these while ocean fishing in Alaska. Fantastic product. Keep me warm through three days of rainy and cold weather without hindering my movement. Most importantly it has a fly which for some reason many competitors products do not. I am 6’2” tall and weigh 208 lbs and extra large fit well.

### ⭐⭐⭐⭐⭐ Best long johns I've ever owned !
*by R***. on October 14, 2025*

The Merino Wool Base Layer Mens Bottom Pants are very warm, soft and comfy. I bought the Heavyweight, 320g bottoms, and I was worried about them being too thick, they're not that thick at all, they are perfect, very, very comfortable and warm. I was golfing with them in 40 degree weather with 12 mph wind and my legs were not cold at all, plus they were not too warm either, actually just right. I didn't where anything but a t-shirt, polo shirt, and light wind proof Foot Joy golf jacket on top, but my chest and arms were not as comfy warm, as my legs were, even though I was wearing thin golf pants over the Merino bottoms. I live in a cold, northern, climate and have bought many, many, different types of "long Johns" and these are by far the best I've ever bought. When it comes to bottom layer long johns, I think they should be snug, but not too tight, I have a 33 inch waist and a 32 inch inseam and their medium size fit me perfect!

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-09-02*