---
product_id: 21695970
title: "Thermajohn Men's J-t-m-1836"
brand: "thermajohn"
price: "S$87"
currency: SGD
in_stock: true
reviews_count: 13
category: "Thermajohn"
url: https://www.desertcart.sg/products/21695970-thermajohn-mens-j-t-m-1836
store_origin: SG
region: Singapore
---

# Advanced moisture-wicking Superior heat retention Ultra-soft fleece lining Thermajohn Men's J-t-m-1836

**Brand:** thermajohn
**Price:** S$87
**Availability:** ✅ In Stock

## Summary

> 🔥 Embrace the cold with Thermajohn – your ultimate winter survival suit!

## Quick Answers

- **What is this?** Thermajohn Men's J-t-m-1836 by thermajohn
- **How much does it cost?** S$87 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/21695970-thermajohn-mens-j-t-m-1836)

## Best For

- thermajohn enthusiasts

## Why This Product

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

## Key Features

- • **Layer Like a Pro:** Lightweight design ideal for layering under workwear, casual clothes, or pajamas.
- • **All-Day Cozy Warmth:** Fleece-lined softness that feels like a warm hug, perfect for long winter days.
- • **Stay Dry, Stay Fresh:** Breathable fabric wicks away moisture to keep you comfortable and sweat-free.
- • **Snug Yet Stretchy Fit:** High-stretch material ensures freedom of movement without sagging or bunching.
- • **Durability Meets Style:** Maintains shape and warmth wash after wash, with a waistband that stays put.

## Overview

Thermajohn Men's J-t-m-1836 thermal underwear features ultra-soft fleece lining and high-stretch lightweight fabric designed for superior heat retention and moisture-wicking. Engineered for a snug, comfortable fit that stays in place, this base layer is perfect for cold weather work, outdoor activities, or cozy indoor wear. Highly rated and durable, it’s a must-have for anyone serious about staying warm without bulk.

## Description

Thermajohn Long Johns Thermal Underwear for Men Fleece Lined Base Layer Set for Cold Weather (Medium, Navy)

Review: 5-Star Review for Thermajohn Long Johns – AKA My Cold Weather Survival Suit - I never thought I’d be this emotionally attached to a pair of long johns, but here we are. The Thermajohn Thermal Underwear Set is like a warm hug from a teddy bear who also happens to be a professional insulation expert. Seriously—this fleece-lined base layer has no business being this cozy. I put them on during a cold snap and haven’t looked back since. I’ve worn them under jeans, joggers, and even pajama pants (don’t judge me). I’d wear them to work if I could. They’re warm but not bulky, stretchy without being saggy, and soft enough to make you question every other piece of clothing you own. Also, shoutout to the waistband for staying in place and not playing “let’s roll down every 10 minutes.” These long johns understood the assignment. If you’re looking to brave the cold while feeling like a warm cinnamon roll, these are it. Buy them. Your frozen thighs will thank you.
Review: Helps while working out in the cold - I recently bought these thermal long johns for my boyfriend, who works in a cold environment, and they have been an absolute game-changer! Not only do they keep him warm and comfortable throughout his entire shift, but they also allow him to move freely without feeling restricted. The material is top-notch, providing excellent insulation without adding unnecessary bulk. One of the best things about these long johns is their versatility. He can wear them under his work uniform for added warmth or even use them as a base layer during outdoor activities. The quality is evident, and they have held up remarkably well even after multiple washes. Additionally, the fit is spot on, and he loves how they don’t ride up or bunch during the day. They are true to size and provide a snug yet comfortable fit that doesn’t hinder movement. Overall, I highly recommend these thermal long johns to anyone working in cold conditions or anyone looking for reliable and comfortable thermal wear. They have exceeded our expectations in terms of warmth, comfort, and durability. A definite five-star product!

## Features

- Ultra Soft Fleece: Designed with a fleece lining & quality material, these ultra soft mens thermal underwear set will keep you feeling comfortable throughout the day
- Layer Up: Layering is essential to ward off the cold, so bundle up with a pair of mens thermals this winter and stay comfortable while outside or in bed as a pajama
- Heat Retention: When it comes to warmth and everyday wear, these long johns for men is designed specifically for you to stay protected from the cold
- Moisture Wicking: Stay dry with these long underwear mens as they're made from breathable fabric that effectively wicks away moisture and perspiration

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B018DQI504 |
| Age Range Description | Adult |
| Apparel Fabric Stretch | High Stretch |
| Apparel Fabric Weight Class | Lightweight |
| Best Sellers Rank | #42,338 in Clothing, Shoes & Jewelry ( See Top 100 in Clothing, Shoes & Jewelry ) #14 in Men's Thermal Underwear Bottoms |
| Brand Name | Thermajohn |
| Collection Name | Winter |
| Color | Black |
| Customer Reviews | 4.6 out of 5 stars 50,436 Reviews |
| Fit Type | Snug |
| Fit to Size Sentiment | Positive |
| Garment Size Country | United States |
| Global Trade Identification Number | 00856780008398 |
| Item Weight | 12 ounces |
| Manufacturer Part Number | LYSB018DQI504-SPRTSEQIP |
| Number of Items | 1 |
| Package Quantity | 1 |
| Pattern | Solid |
| Size | X-Large |
| Sleeve Length Description | Long Sleeve |
| Sleeve Type | Long Sleeve |
| Style Number | J-T-M |
| UPC | 856780008398 |
| Unit Count | 1 Set |

## Images

![Thermajohn Men's J-t-m-1836 - Image 1](https://m.media-amazon.com/images/I/51qMowmobXL.jpg)

## Available Options

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

## Questions & Answers

**Q: My son's 6 ft to 6 ft 2, and 140 lbs, large in undershirts and small in underwear. what size should i order for him?**
A: I'm 6'4" 180lbs, and was always like that as a teenager- large tops, small or sometimes medium bottoms. I filled out in my 20s-30s when I stopped skipping leg days, to be more like L bottoms, XL tops. Now, in my 40s, I'm a L top and 34"w x36L in Balmain, Gucci, Mike Amiri, Raf Simons, Ralph Lauren, Dulce & Cabana etc., actually I have an aunt who detests $2000+ for jeans and sends me Levi's every Christmas to make a point. 32 waist (well hips actually idk who wears jeans up that high but if it did I could actually wear a 28" or 30" but then I would need a 40"-42"L LOL 
Shop clerk, "Can I help you with anything sir? Mmm yes, I'd like to try on a 28Wx42L in these dodgy looking Walmart jeans please shop keep, I cannot seem to find anything on the rack 🤔?) 
Crazy. So I tried XL. Ha. No way. Maybe 1 leg in each of 2 pair, otherwise, mmmno. XXL was too tight (stretched too thin in my glutes, thighs & calves, and still too short -- looked like I was waiting for the flood. 3XL made all the difference. If he's 6'2" but under a buck fifty, XXL will give him a good fit + room to grow. I should have considered that - if I was 2 inches taller ( 6'6" ) these would be too short and then all the extra material that fits me as I am, would be higher up and therefore too small. So, long story short, XXL now [✓] If you anticipate him growing much more in the near future: 3XL. Good luck! 👖👕🧦🧤🧥🧣🛍️🩲🧢👟🥾⌚💎🎒👜👓🕶️

**Q: My husband is 6 ft 155 lbs. so tall and skinny. What size should I get him?**
A: My husband is 5' 8'" and weighs up to 175 at his heaviest.  I got a medium for him and the length was just perfect.  As the other person said, they fit like tights or like a good athletic shirt that I can't name but will stretch depending on the size of the person.  I would think a large would be needed for his height.

**Q: Im 6ft 5 and 219 what size should i get?**
A: I'm 6 2", 230 and I got xxl.    If I bought again I'd get xxxl.    They run small, and are a stretchy material that's comfortable but really hugs the skin. Pretty nice overall, though.

**Q: Im 5'5 and 180 lbs with a waist between 32 and 34. What size should i get?**
A: X-large they run small

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5-Star Review for Thermajohn Long Johns – AKA My Cold Weather Survival Suit
*by K***S on June 2, 2025*

I never thought I’d be this emotionally attached to a pair of long johns, but here we are. The Thermajohn Thermal Underwear Set is like a warm hug from a teddy bear who also happens to be a professional insulation expert. Seriously—this fleece-lined base layer has no business being this cozy. I put them on during a cold snap and haven’t looked back since. I’ve worn them under jeans, joggers, and even pajama pants (don’t judge me). I’d wear them to work if I could. They’re warm but not bulky, stretchy without being saggy, and soft enough to make you question every other piece of clothing you own. Also, shoutout to the waistband for staying in place and not playing “let’s roll down every 10 minutes.” These long johns understood the assignment. If you’re looking to brave the cold while feeling like a warm cinnamon roll, these are it. Buy them. Your frozen thighs will thank you.

### ⭐⭐⭐⭐⭐ Helps while working out in the cold
*by B***Z on January 23, 2024*

I recently bought these thermal long johns for my boyfriend, who works in a cold environment, and they have been an absolute game-changer! Not only do they keep him warm and comfortable throughout his entire shift, but they also allow him to move freely without feeling restricted. The material is top-notch, providing excellent insulation without adding unnecessary bulk. One of the best things about these long johns is their versatility. He can wear them under his work uniform for added warmth or even use them as a base layer during outdoor activities. The quality is evident, and they have held up remarkably well even after multiple washes. Additionally, the fit is spot on, and he loves how they don’t ride up or bunch during the day. They are true to size and provide a snug yet comfortable fit that doesn’t hinder movement. Overall, I highly recommend these thermal long johns to anyone working in cold conditions or anyone looking for reliable and comfortable thermal wear. They have exceeded our expectations in terms of warmth, comfort, and durability. A definite five-star product!

### ⭐⭐⭐⭐⭐ warm ish
*by S***H on July 6, 2026*

Bougtht for warehouse in winter. Will keep you warm but not cooking hot. does not protect against winds but under clothes helps.

## Frequently Bought Together

- Thermajohn Long Johns Thermal Underwear for Men Fleece Lined Base Layer Set for Cold Weather
- Alvada Warm Thermal Wool Socks for Winter Moisture Wicking and Breathable Cozy Boot Socks
- Alvada Merino Wool Hiking Socks Thermal Warm Crew Winter Boot Sock For Men & Women 3 Pairs

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-08-08*