---
product_id: 85857983
title: "O'Neill 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: "$163.47"
currency: USD
in_stock: true
category: "O'neill"
url: https://www.desertcart.us/products/85857983-oneill-mens-thermo-x-long-sleeve-crew-neck-rashguard-top
store_origin: US
region: United States of America
---

# Thermo-X Insulation, Low Bulk 4-Way Stretch for Mobility UPF 50+ Sun Protection O'Neill 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:** $163.47
**Availability:** ✅ In Stock

## Summary

> 🌊 Gear Up, Stand Out: The Ultimate Rashguard for the Modern Water Warrior

## Quick Answers

- **What is this?** O'Neill 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?** $163.47 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/85857983-oneill-mens-thermo-x-long-sleeve-crew-neck-rashguard-top)

## 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 faster with advanced HyperDry technology that repels water and resists odors.
- • **Thermo-X Thermal Fleece Tech:** Experience lightweight warmth without the bulk—perfect for chilly water or crisp mornings.
- • **Shield Your Skin with UPF 50+:** Stay protected from harmful UV rays while you conquer the waves or the city streets.
- • **Move Freely with 4-Way Stretch:** Snug fit that flexes with your every move, layering seamlessly under your wetsuit or on its own.
- • **Designed for the Active Millennial:** Modern style meets performance—trusted O’Neill quality that keeps up with your adventurous lifestyle.

## Overview

The O'Neill Men's Thermo-X Long Sleeve Crew-Neck Rashguard combines UPF 50+ sun protection with advanced Thermo-X thermal fleece fabric, delivering lightweight insulation and quick-dry performance. Featuring 4-way stretch for maximum mobility and odor resistance, this rashguard is designed for active water sports enthusiasts seeking comfort, durability, and style in one sleek layer.

## 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.

## 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 | B06XGRNYGT |
| Age Range Description | Adult |
| Apparel Closure Type | Pull On |
| Apparel Fabric Stretch | Medium Stretch |
| Apparel Fabric Weight Class | Medium Weight |
| Best Sellers Rank | #45,539 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 4.6 out of 5 stars (327) |
| 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 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 |
| Pattern | Solid |
| Product Benefits | Quick-drying, UV protection, insulation |
| 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 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.

## 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.us/products/85857983-oneill-mens-thermo-x-long-sleeve-crew-neck-rashguard-top](https://www.desertcart.us/products/85857983-oneill-mens-thermo-x-long-sleeve-crew-neck-rashguard-top)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-08-26*