---
product_id: 85857983
title: "O'NEILL Men's Thermo-X UPF 50+ L/S Crew-Neck Rashguard"
brand: "o'neill"
price: "R2481"
currency: ZAR
in_stock: true
reviews_count: 10
category: "O'neill"
url: https://www.desertcart.co.za/products/85857983-oneill-mens-thermo-x-upf-50-l-s-crew-neck
store_origin: ZA
region: South Africa
---

# Quick-Dry & Water Repellent Thermo-X Insulation UPF 50+ Sun Shield O'NEILL Men's Thermo-X UPF 50+ L/S Crew-Neck Rashguard

**Brand:** o'neill
**Price:** R2481
**Availability:** ✅ In Stock

## Summary

> 🌊 Gear up, stay warm, and outshine the waves with O'Neill’s Thermo-X Rashguard!

## Quick Answers

- **What is this?** O'NEILL Men's Thermo-X UPF 50+ L/S Crew-Neck Rashguard by o'neill
- **How much does it cost?** R2481 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/85857983-oneill-mens-thermo-x-upf-50-l-s-crew-neck)

## 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

- • **Stay Fresh & Dry:** Water-repellent and odor-resistant nylon/spandex blend ensures quick drying and lasting comfort, no matter how intense your session gets.
- • **Ultimate Sun Defense:** UPF 50+ rating recommended by Skin Cancer Foundation keeps you protected from harmful UV rays during every water adventure.
- • **Seamless Style & Durability:** Flatlock seams reduce chafing and enhance durability, so you look sharp and feel comfortable from surf to shore.
- • **Thermo-X Warmth Without Bulk:** Advanced thermal fleece fabric delivers lightweight insulation, so you stay warm without feeling weighed down under your wetsuit.
- • **Performance Fit for Maximum Mobility:** Snug, 4-way stretch fabric moves like a second skin, perfect for layering and unrestricted movement in any watersport.

## Overview

The O'Neill Men's Thermo-X UPF 50+ Long Sleeve Crew-Neck Rashguard combines high-performance thermal insulation with superior sun protection and quick-dry technology. Designed for active water sports enthusiasts, it features a lightweight, water-repellent nylon/spandex fabric with odor resistance and a snug, flexible fit that layers seamlessly under wetsuits. Recommended by the Skin Cancer Foundation, this rashguard offers durable comfort and protection for chilly days on the water.

## 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

- 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 | B06XGRNYGT |
| Age Range Description | Adult |
| Apparel Closure Type | Pull On |
| Apparel Fabric Stretch | Medium Stretch |
| Apparel Fabric Weight Class | Medium Weight |
| Best Sellers Rank | #75,869 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #11 in Men's Diving Rash Guard Shirts |
| Brand Name | O'NEILL |
| Care instructions | Hand Wash Only |
| Closure type | Pull On |
| Color | Black |
| Customer Reviews | 4.6 out of 5 stars 325 Reviews |
| Fabric Type | Other Fibers |
| Fabric type | Other Fibers |
| Fit Type | Snug |
| Fit to Size Sentiment | True to Size |
| Garment Size Country | United States |
| Global Trade Identification Number | 00191015009734 |
| Import Designation | Imported |
| Included Components | wetsuit |
| Item Highlight | Sun and Rash Protection with 4-Way Stretch Thermal Fleece Fabric |
| Item Type Name | Rash Guard |
| Item Weight | 1.6 ounces |
| Life Event | Leisure Time |
| Manufacturer | O'Neill Wetsuits |
| Manufacturer Part Number | 5022-002-L |
| Manufacturer Warranty Description | GENERAL WARRANTY INFORMATION AND POLICY: If the product is found to be defective under normal use and proper care, O'Neill Wetsuits will repair or replace, at O'Neill Wetsuits' option. This decision to replace or repair is made by the O'Neill Wetsuit Warranty Department after receipt of the defective product. At no time does O'Neill Wetsuits offer refunds. For more information, go to: https://us.o… |
| Material Type | Nylon, Spandex |
| Neck Style | Crew Neck |
| Number of Items | 1 |
| Origin | Imported |
| Pattern | Solid |
| Product Benefits | Provides UPF 50+ sun protection and thermal warmth |
| Product Care Instructions | Hand Wash Only |
| Rise Style | Mid Rise |
| Size | Large |
| 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 | 191015009734 |
| Ultraviolet Protection Factor | UPF 50+ |
| Unit Count | 1 Count |
| character | sports |

## Images

![O'NEILL Men's Thermo-X UPF 50+ L/S Crew-Neck Rashguard - 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.)

### ⭐⭐⭐⭐⭐ Wonderful for cold days
*by N***. on December 19, 2024*

This shirt exceeded my expectations. I swim laps outdoors and it's gotten cold. This shirt makes it lot more comfortable on cold or rainy days at the pool. Like another reviewer suggested, I ordered one size larger than I typically wear. It is snug so the water doesn't pump too much and it is a little difficult to get off but it works well. I'm about 145 pounds, 5'-9'' and I ordered a large.

## Frequently Bought Together

- O'Neill Men's Thermo X Long Sleeve Insulative Top
- O'Neill Men's Premium Skins UPF 50+ Shorts
- O'Neill Men's Thermo X Short Sleeve Insulative Top

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**Shop now:** [https://www.desertcart.co.za/products/85857983-oneill-mens-thermo-x-upf-50-l-s-crew-neck](https://www.desertcart.co.za/products/85857983-oneill-mens-thermo-x-upf-50-l-s-crew-neck)

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-10-05*