---
product_id: 44689037
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: "VT28949"
currency: VUV
in_stock: true
reviews_count: 10
category: "O'neill"
url: https://www.desertcart.vu/products/44689037-oneill-mens-thermo-x-long-sleeve-crew-neck-rashguard-top
store_origin: VU
region: Vanuatu
---

# 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:** VT28949
**Availability:** ✅ In Stock

## 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?** VT28949 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/44689037-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

## 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: Fits better than a glove - I only buy O'Neill wetsuit products as I find they are the only company whose size chart is accurate for me. This is a well made thin wetsuit long sleeve top that fits like a glove. You won't even know you're wearing it outside of the warmth it provides. It's ideal for this early fall days when the temperatures begin to fall and these's some wind....Mobility, paddling, is excellent..like I said You wouldn't know you're wearing a wetsuit top.
Review: Warm and well made - Own a bunch of O’Neill rashguards so naturally picked up a Thermo X for fall/winter. It’s basically what I would call a quarter mil rashguard as it’s slightly bulkier than their standard rashguards given the slightly thicker material with fleece lining. It’s thinner than 0.5mm tops though so 0.25mm seems like a fair description. No issue with movement restrictions. I wear this under a union suit that is under my dry suit for kayaking. Have been down in 20s on the water and not slightly bit cold whatsoever. Works exactly like I hoped. I have some thermal compression shirts I bought for this particular use case and picked this up afterwards. While the compression shirts are warm they sit a tad looser, nothing crazy but noticeably different fit as this sits tighter on body. But the Thermo X is definitely warmer, sometimes paying up is well worth it, this is one of those times.

## 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 | B06XGQT5Q9 |
| Age Range Description | Adult |
| Apparel Closure Type | Pull On |
| Apparel Fabric Stretch | Medium Stretch |
| Apparel Fabric Weight Class | Medium Weight |
| Back Style | Crew Neck |
| Best Sellers Rank | #72,900 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #11 in Men's Diving Rash Guard Shirts |
| Brand Name | O'NEILL |
| Chest Size | 52 Inches |
| Color | Black |
| Customer Reviews | 4.6 4.6 out of 5 stars (319) |
| Fabric Type | Other Fibers |
| Fit Type | Snug |
| Fit to Size Sentiment | True to Size |
| Garment Size Country | United States |
| Global Trade Identification Number | 00191015009772 |
| Included Components | wetsuit |
| Item Type Name | Rash Guards |
| Lining Description | The lining is made of 220g Nylon/Spandex with HyperDry technology, similar to the outer shell, providing a smooth and quick-dry inner layer. |
| Manufacturer | O'Neill Wetsuits |
| Manufacturer Part Number | 5022-002-2XL |
| Material Type | Nylon, Spandex |
| Neck Style | Crew Neck |
| Number of Items | 1 |
| Pattern | Solid |
| Product Care Instructions | Hand Wash Only |
| Rise Style | Mid Rise |
| Size | XX-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 | 191015009772 |
| 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/61tH43A3C9L.jpg)
![O'Neill Men's Thermo-X Long Sleeve Crew-Neck Rashguard Top, UPF 50+ Sun Protection with 4-Way Stretch Thermal Fleece Fabric - Image 2](https://m.media-amazon.com/images/I/71HQ+fVVUcL.jpg)
![O'Neill Men's Thermo-X Long Sleeve Crew-Neck Rashguard Top, UPF 50+ Sun Protection with 4-Way Stretch Thermal Fleece Fabric - Image 3](https://m.media-amazon.com/images/I/71bctpqXGTL.jpg)
![O'Neill Men's Thermo-X Long Sleeve Crew-Neck Rashguard Top, UPF 50+ Sun Protection with 4-Way Stretch Thermal Fleece Fabric - Image 4](https://m.media-amazon.com/images/I/510e7gRJCxL.jpg)
![O'Neill Men's Thermo-X Long Sleeve Crew-Neck Rashguard Top, UPF 50+ Sun Protection with 4-Way Stretch Thermal Fleece Fabric - Image 5](https://m.media-amazon.com/images/I/71Gcohop1yL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Fits better than a glove
*by A***R on November 3, 2024*

I only buy O'Neill wetsuit products as I find they are the only company whose size chart is accurate for me. This is a well made thin wetsuit long sleeve top that fits like a glove. You won't even know you're wearing it outside of the warmth it provides. It's ideal for this early fall days when the temperatures begin to fall and these's some wind....Mobility, paddling, is excellent..like I said You wouldn't know you're wearing a wetsuit top.

### ⭐⭐⭐⭐⭐ Warm and well made
*by W***. on November 20, 2023*

Own a bunch of O’Neill rashguards so naturally picked up a Thermo X for fall/winter. It’s basically what I would call a quarter mil rashguard as it’s slightly bulkier than their standard rashguards given the slightly thicker material with fleece lining. It’s thinner than 0.5mm tops though so 0.25mm seems like a fair description. No issue with movement restrictions. I wear this under a union suit that is under my dry suit for kayaking. Have been down in 20s on the water and not slightly bit cold whatsoever. Works exactly like I hoped. I have some thermal compression shirts I bought for this particular use case and picked this up afterwards. While the compression shirts are warm they sit a tad looser, nothing crazy but noticeably different fit as this sits tighter on body. But the Thermo X is definitely warmer, sometimes paying up is well worth it, this is one of those times.

### ⭐⭐⭐⭐⭐ 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.

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**Shop now:** [https://www.desertcart.vu/products/44689037-oneill-mens-thermo-x-long-sleeve-crew-neck-rashguard-top](https://www.desertcart.vu/products/44689037-oneill-mens-thermo-x-long-sleeve-crew-neck-rashguard-top)

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-05-04*