---
product_id: 61061425
title: "Jianai Men's Heavy-Weight Four-Layer Thermal Underwear Bottoms Pants (Large, Gray)"
brand: "jianai"
price: "477 Lei"
currency: RON
in_stock: false
reviews_count: 8
url: https://www.desertcart.ro/products/61061425-jianai-mens-heavy-weight-four-layer-thermal-underwear-bottoms-pants
store_origin: RO
region: Romania
---

# 4-layer ultra thermal insulation High-rise fit for full coverage Machine washable durability Jianai Men's Heavy-Weight Four-Layer Thermal Underwear Bottoms Pants (Large, Gray)

**Brand:** jianai
**Price:** 477 Lei
**Availability:** ❌ Out of Stock

## Summary

> ❄️ Stay warm, stay winning—because cold weather waits for no one!

## Quick Answers

- **What is this?** Jianai Men's Heavy-Weight Four-Layer Thermal Underwear Bottoms Pants (Large, Gray) by jianai
- **How much does it cost?** 477 Lei with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/61061425-jianai-mens-heavy-weight-four-layer-thermal-underwear-bottoms-pants)

## Best For

- jianai enthusiasts

## Why This Product

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

## Key Features

- • **Effortless Care:** Machine washable design means no hassle—ready for your next adventure or workday.
- • **Streamlined Fit:** High-rise, straight-leg cut offers full coverage and easy layering without feeling bulky.
- • **Next-Level Warmth:** Four-layer heavy-weight fabric traps heat without bulk, keeping you toasty in freezing temps.
- • **Comfort That Lasts:** Tag-free and shrinkage-controlled for a perfect fit that stays true wash after wash.
- • **Versatile Cold-Weather Essential:** Ideal for outdoor pros and weekend warriors—hiking, skiing, camping, or working in the cold.

## Overview

Jianai Men's Heavy-Weight Four-Layer Thermal Underwear Bottoms deliver superior warmth with a four-layer design that’s ultra-soft and tag-free for all-day comfort. Engineered for durability with shrinkage control and machine washable convenience, these high-rise thermal pants are perfect for demanding outdoor activities or cold-weather work. Designed to keep you warm without bulk, they’re the go-to base layer for professionals and adventurers who refuse to let winter slow them down.

## Description

The heavy weight thermal pants for those that like to play or need to work, no matter what the temp is outside. Delivers comfort and warmth in all cold weather environments - whether at home, on the job or enjoying the outdoors. Winter is coming.Forget the days you shiver with cold wearing single or double layer pants.

Review: Works in freezing temps. - This review is for Jianai thermal pants. I’m sitting outside in Zion National Park at night in just these thermals (no top layers). It’s 30°F. I’m toasty warm. Everyone else is cold. I knew nothing about these thermals so I was apprehensive about clicking the buy button. I gambled and won, BIG TIME. Impressively warm and comfortable. No sweat/moisture issues. No static issues. They seem very well made and durable. I would buy a thermal top too if they made one. Duofold Expedition heavyweight thermals are great quality and are my go-to for cooler temps but those are lightweight compared these Jianai thermals. I have five sets of Duofolds but when it gets COLD, I use these Jianais now. I hiked The Narrows at Zion which involves walking in waist deep ice-water. I was wearing these thermals under my dry suit. I was miserably hot. After wallowing around in the water a bit and getting some of that ice-water inside my dry suit and soaking these thermals, I was much happier. These thermals are next-level warm.
Review: VERY MIXED BAG - Very thick and warm. But MUCH too small and tight. I bought large. I'm 5' 11" slim build and have to struggle to get it on and off. And so tight I feel like my body is trapped inside. Very uncomfortable. Will it shrink even tighter when washed or loosen up some when worn? Was going to exchange for larger size but there is no larger size than 'large'. Also fly is so small and tight as to be useless. And waistband doesn't feel particularly strong like it might not last long. Otherwise would be a great product....

## Features

- Machine Wash.
- Four-layer thermal pants, not bulky. Ultra Soft, Warm and Comfortable.
- Tag-free for comfort. Shrinkage controlled for lasting size and shape retention.
- Perfect option for working outside, hiking, skiing, camping in Cold Winter.
- Please order the size refer to the size chart on the left image.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Care instructions | Machine Wash |
| Leg style | Straight |
| Pocket style | Utility Pocket |
| Rise style | High Rise |

## Images

![Jianai Men's Heavy-Weight Four-Layer Thermal Underwear Bottoms Pants (Large, Gray) - Image 1](https://m.media-amazon.com/images/I/61Zv1FCuVoL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works in freezing temps.
*by J***S on November 25, 2022*

This review is for Jianai thermal pants. I’m sitting outside in Zion National Park at night in just these thermals (no top layers). It’s 30°F. I’m toasty warm. Everyone else is cold. I knew nothing about these thermals so I was apprehensive about clicking the buy button. I gambled and won, BIG TIME. Impressively warm and comfortable. No sweat/moisture issues. No static issues. They seem very well made and durable. I would buy a thermal top too if they made one. Duofold Expedition heavyweight thermals are great quality and are my go-to for cooler temps but those are lightweight compared these Jianai thermals. I have five sets of Duofolds but when it gets COLD, I use these Jianais now. I hiked The Narrows at Zion which involves walking in waist deep ice-water. I was wearing these thermals under my dry suit. I was miserably hot. After wallowing around in the water a bit and getting some of that ice-water inside my dry suit and soaking these thermals, I was much happier. These thermals are next-level warm.

### ⭐⭐⭐⭐ VERY MIXED BAG
*by E***N on July 4, 2023*

Very thick and warm. But MUCH too small and tight. I bought large. I'm 5' 11" slim build and have to struggle to get it on and off. And so tight I feel like my body is trapped inside. Very uncomfortable. Will it shrink even tighter when washed or loosen up some when worn? Was going to exchange for larger size but there is no larger size than 'large'. Also fly is so small and tight as to be useless. And waistband doesn't feel particularly strong like it might not last long. Otherwise would be a great product....

### ⭐⭐⭐⭐⭐ Deer Hunting
*by C***E on February 25, 2021*

These are perfect for sitting in a deer blind on a cold morning to stay warm. They are too heavy for extreme activity and would most likely be way to hot. during deer bow season in southern Ohio it can get into single digits and unless you're layered up right it can get uncomfortable. To summarize: perfect for motionless hunting from blind too heavy /hot for activity. In fact on 15degree F mornings I would be sweating after walking to my blinds about 1/2 to 3/4 mile. I imagine if you are in colder areas they would be ok to work or be active outside. Wish I could find a matching top. Update 19 Nov 2022: still holding up well and provide good warmth. One criticism the fly is in fact worthless. Not to be gross but it’s easier to just pull front down to do your business. It is an effort to use the fly. I still haven’t found matching top. Anyone?

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-02-02*