---
product_id: 44689036
title: "Men's Thermo-X Long Sleeve Crew-Neck Rashguard Top, UPF 50+ Sun Protection with 4-Way Stretch Thermal Fleece Fabric"
brand: "o'neill"
price: "R2498"
currency: ZAR
in_stock: true
reviews_count: 10
category: "O'neill"
url: https://www.desertcart.co.za/products/44689036-mens-thermo-x-long-sleeve-crew-neck-rashguard-top-upf
store_origin: ZA
region: South Africa
---

# Thermo-X Insulation, Low Bulk 4-Way Stretch for Mobility UPF 50+ Sun Protection Men's Thermo-X Long Sleeve Crew-Neck Rashguard Top, UPF 50+ Sun Protection with 4-Way Stretch Thermal Fleece Fabric

**Brand:** o'neill
**Price:** R2498
**Availability:** ✅ In Stock

## Summary

> 🌊 Gear Up, Stay Warm & Protected — Own Every Wave!

## Quick Answers

- **What is this?** Men's Thermo-X Long Sleeve Crew-Neck Rashguard Top, UPF 50+ Sun Protection with 4-Way Stretch Thermal Fleece Fabric by o'neill
- **How much does it cost?** R2498 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/44689036-mens-thermo-x-long-sleeve-crew-neck-rashguard-top-upf)

## Best For

- o'neill enthusiasts

## Why This Product

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

## Key Features

- • **Quick-Dry & Odor Resistant:** Stay fresh and dry longer with advanced HyperDry technology and water-repellent fabric.
- • **Shield Your Skin with UPF 50+:** Stay protected from harmful UV rays while you conquer the waves or the outdoors.
- • **Move Freely with 4-Way Stretch:** Snug, second-skin fit that flexes with your every move, no restrictions, just performance.
- • **Thermo-X Thermal Fleece Comfort:** Experience lightweight warmth without the bulk—perfect for chilly water or cool days.
- • **Seamless Layering Under Your Wetsuit:** Super low neck design avoids interference, making it the ideal base layer for serious water sports pros.

## Overview

The O'Neill Men's Thermo-X Long Sleeve Rashguard combines UPF 50+ sun protection with innovative Thermo-X thermal fleece fabric, delivering lightweight insulation and quick-dry performance. Designed with 4-way stretch and a snug, second-skin fit, it offers maximum mobility and comfort as a base layer or standalone top for water sports. Its water-repellent, odor-resistant properties and super low neck make it a must-have for surfers, divers, and outdoor enthusiasts seeking warmth and protection without bulk.

## Description

The O’Neill Men’s Thermo-X Long Sleeve Crew delivers quick-dry, lightweight insulation, UV protection, and comfort in and out of the water. Designed with a performance fit, it moves like a second skin for maximum mobility and layering versatility. The U.P.F. 50+ rating shields against harmful rays, while the quick-dry 4-way stretch fabric and flatlock seams add durability and comfort. Featuring Thermo-X HyperDry technology, this top minimizes water absorption while providing insulation and rash protection. Ideal for surfing, swimming, paddling, kayaking, wakeboarding, waterskiing, snorkeling, diving, windsports, or simply enjoying your favorite activity on the water. Thermo-X offers a reliable fit, fresh modern style, and the trusted O’Neill quality that’s built to last.

Review: Excellent layer for extra warmth - This is perfect! I can’t wait to dive with it, I typically dive in the tropics April-September and sometimes get chilly during the 2nd dive of the day (specially in the spring/fall months). This shirt is lined with a fleece like material, I suspect this will be the perfect amount of extra heat (without it being too much) that I need to be comfortable. The fit is tight, but that’s what you need, there should be no wrinkles in the fabric - that’s being said, the measurement chart is spot on!
Review: Caribbean snorkeling! - Used in the Caribbean during May snorkeling adventures. Perfect weight. Keeps you warm, but is light and comfortable to wear. Highly recommend. (Size Large fit perfect for 6’2” @ 185 pounds.)

## Features

- Other Fibers
- Imported
- Skin Cancer Foundation Recommended Product; UPF 50+ Ultraviolet Protection
- Perfect For Chilly Days When An Extra Layer Of Warmth Under Your Wetsuit Is Needed
- Thermo-X Layering Fabric Provides Incredible Insulation With Low Bulk And Quik-Dry Properties
- 220g Nylon/Spandex Includes Water Repellency And Odor Resistance
- ***Super Low Neck: No Interference With The Neck Of Your Wetsuit

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B06XG96QBQ |
| Age Range Description | Adult |
| Apparel Closure Type | Pull On |
| Apparel Fabric Stretch | Medium Stretch |
| Apparel Fabric Weight Class | Medium Weight |
| Back Style | Standard |
| Best Sellers Rank | #37,661 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #10 in Men's Diving Rash Guard Shirts |
| Brand Name | O'NEILL |
| Color | Black |
| Customer Reviews | 4.6 out of 5 stars 328 Reviews |
| Fabric Type | Other Fibers |
| Fit Type | Snug |
| Fit to Size Sentiment | True to Size |
| Garment Size Country | United States |
| Global Trade Identification Number | 00191015002421 |
| Import Designation | Imported |
| Included Components | wetsuit |
| Item Type Name | Rash Guards |
| Lining Description | Thermo-X Fabric |
| Manufacturer | O'Neill Wetsuits |
| Manufacturer Part Number | 5022-002-M |
| Material Type | Nylon, Spandex |
| Neck Style | Crew Neck |
| Number of Items | 1 |
| Pattern | Solid |
| Product Benefits | Sun Protection and Rash Prevention |
| Product Care Instructions | Hand Wash Only |
| Rise Style | Mid Rise |
| Size | Medium |
| Sleeve Length Description | Long Sleeve |
| Sleeve Type | Long Sleeve |
| Special Size Type | Standard |
| Strap Type | Non-Adjustable |
| Style Name | Men's Thermo-x L/S Crew |
| Style Number | 5022 |
| Swimwear Form Type | Rash Guard |
| Swimwear Top Form | Rash Guard Top |
| UPC | 191015002421 |
| Ultraviolet Protection Factor | UPF 50+ |
| Unit Count | 1 Count |
| character | sports |

## Images

![Men's Thermo-X Long Sleeve Crew-Neck Rashguard Top, UPF 50+ Sun Protection with 4-Way Stretch Thermal Fleece Fabric - Image 1](https://m.media-amazon.com/images/I/71Uu4GSn8EL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent layer for extra warmth
*by L***O on June 8, 2026*

This is perfect! I can’t wait to dive with it, I typically dive in the tropics April-September and sometimes get chilly during the 2nd dive of the day (specially in the spring/fall months). This shirt is lined with a fleece like material, I suspect this will be the perfect amount of extra heat (without it being too much) that I need to be comfortable. The fit is tight, but that’s what you need, there should be no wrinkles in the fabric - that’s being said, the measurement chart is spot on!

### ⭐⭐⭐⭐⭐ Caribbean snorkeling!
*by P***E on August 20, 2026*

Used in the Caribbean during May snorkeling adventures. Perfect weight. Keeps you warm, but is light and comfortable to wear. Highly recommend. (Size Large fit perfect for 6’2” @ 185 pounds.)

### ⭐⭐⭐⭐⭐ Use in chlorine pool for water aerobics - works great!
*by G***1 on December 11, 2022*

I wear this under my swimsuit tank top (I'm a woman) to keep my upper body warm in the winter months while doing water aerobics and water walking in a heated chlorinated pool. So far it is holding up just fine - I have worn it during 24 1-hr sessions and it has not faded, has not stretched, nor is it showing any signs of breaking down. It keeps my upper body and arms comfortably warm. Even though the Thermo-X fabric is quite stretchy, these tops run very small. I am a fairly large woman (usually wear Woman's 2X) and needed to buy a men's 2XL. Because it is a men's, it is a bit snug at the hips, but the rest of it fits well. Fair warning: once wet it is a bit hard to take off, but once you get one arm out of a sleeve, getting the rest of it off is pretty easy.

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.co.za/products/44689036-mens-thermo-x-long-sleeve-crew-neck-rashguard-top-upf](https://www.desertcart.co.za/products/44689036-mens-thermo-x-long-sleeve-crew-neck-rashguard-top-upf)

---

*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-09-12*