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O'NEILL

O'Neill Men's Reactor-2 3:2mm Back Zip Full Wetsuit, Lightweight Warmth and Flexibility for All Water Activities

  • Based on 1,004 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Sunday, Aug 30
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Size: 3X-Large


Color: Black/Black


Pattern Name: Full Wetsuit


Description

The O’Neill Reactor-2 wetsuit is engineered for performance in a value-driven package, making it the perfect choice for any water enthusiast. Combining stretch, durability, and comfort, this wetsuit delivers everything you need for fun on the water without compromising quality. Designed with Ultraflex neoprene, the Reactor-2 moves with your body for unrestricted performance while still providing dependable warmth. Flatlock-stitched seams enhance comfort and durability so that you can stay active longer without irritation. Whether you’re surfing, swimming, paddling, kayaking, wakeboarding, waterskiing, snorkeling, diving, windsports, or just enjoying a day on the water, the Reactor-2 offers a reliable fit, fresh modern style, and the trusted O’Neill quality that’s built to last. Available in multiple sizes and color options, this wetsuit is ideal for beginners, water adventurers, and seasoned athletes alike.

Product Dimensions ‏ : ‎ 16 x 16 x 5 inches; 2.07 pounds


Item model number ‏ : ‎ 5040


Department ‏ : ‎ mens


Date First Available ‏ : ‎ August 4, 2017


Manufacturer ‏ : ‎ O'Neill Wetsuits


Product Warranty: For warranty information about this product, please click here


Best Sellers Rank: #13,114 in Sports & Outdoors (See Top 100 in Sports & Outdoors) #7 in Full Wetsuits


#7 in Full Wetsuits:


Customer Reviews: 4.5 4.5 out of 5 stars (1,004)


Brand Name: O'NEILL


Sport Type: Boating, Diving, Kayaking, Surfing, Swimming


Age Range Description: Adult


Global Trade Identification Number: 29


UPC: 191015029329


Number of Items: 1


Included Components: Water Sports Equipment


Item Weight: 0.27 g


Item Type Name: Wetsuits


Manufacturer: O'Neill Wetsuits


Model Number: 5040


Unit Count: 1 Count


Manufacturer Part Number: 5040


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


Closure Type: Zipper


Sleeve Type: Long Sleeve


Wetsuit Form Type: Full Body Suit


Item Thickness: 3 millimeters


Chest Size: 49 inches


Size Map: 3X-Large


Waist Size: 44 inches


Material Type: Neoprene


Color: Black/Black


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Aug 30

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Great quality
Size: X-Large Short Color: Black/Slate Pattern Name: Full Wetsuit
Have used wetsuit 6 times. Great quality and is not restricting. Very comfortable and flexible.
Reviewed in the United States on August 15, 2026 by James
    • O’Neill 3/2 Wetsuit - it’s an excellent choice for its intended use
Size: XX-Large Color: Black/Black Pattern Name: Full Wetsuit
Review Image by Roy Fine
Review Image by Roy Fine
Review Image by Roy Fine
Review Image by Roy Fine
Review Image by Roy Fine
I’ve had this wetsuit for 2 years and I use it for when scuba diving. I have approximately 20 dives in it, so my review is in that context. As seen in the posted pictures, it is still in near-new-like condition The O’Neill 3/2mm “entry-level” wetsuit is a solid choice when you need a bit more than a rash guard but don’t want the bulk or don’t need the warmth of a full 3mm suit. It’s perfect for those in-between water temperatures—where a swimsuit is too little, but a full 3mm feels like overkill. The flexibility and comfort are impressive for an entry-level option; it’s easy to get on and off, and I’ve found it moves well in the water without feeling restrictive. It doesn’t provide the full insulation you’d want for colder dives, but it’s great for milder conditions. I used to dive with a 3mm shorty wetsuit when in Cozumel and that was OK 90% of the time. I now find the O’Neill 3/2 is a better choice on boat dives, especially on that chilly boat ride back to the dock after the second tank dive My only minor gripe, and it is a minor one, this model doesn’t come with some of the sealing features you’d see in mid- to higher-end suits, so if you’re in water with a mild chill, you might feel it around the seams. For the price, this is a very capable wetsuit that keeps the chill off, balancing warmth, flexibility, and ease of use. Definitely recommend for anyone looking for a reliable wetsuit in warm to mid-temp conditions, especially so considering the price and the quality of this item. ... show more
Reviewed in the United States on November 4, 2024 by Roy Fine
    • Good suit - but beware of permanent creases from improper packing/shipping
Size: Large Color: Black/Abyss Pattern Name: Full Wetsuit
Review Image by Chris
Review Image by Chris
It fits well and feels comfortable for a wetsuit. I received it today and tried it on indoors. I'm slightly over 5'11 and weigh 167 pounds, and the Large is a good fit for me. I will say one thing though about getting it from Amazon. They really need to do a better job of stowing/packing these in a way that doesn't damage them: similarly to another reviewer who posted a photo, mine arrived improperly packed (or stored?), creating deep permanent creases on the chest and back material (see photos). There are how-to guides and video tutorials online on how to store, fold, pack, and ship a wetsuit. I have an ocean trip coming up and I don't know if exchanging it is worth the hassle and the risk of not getting a replacement on time, or for the replacement to also be creased from bad storing/shipping. ... show more
Reviewed in the United States on August 25, 2022 by Chris
    • Love it!
Size: Large Color: Black/Cool Grey Pattern Name: Full Wetsuit
Purchaded in large im 5ft 10 180lb sleeves sre a tad long and the legs a tad but fits everything else well. I have the LS size but its just a bit small. Tore just under the zipper so large is solid Especially my chest shoulders back. Worn it my last 5 session. So far I love it! I love how it feels and stretches, it's a bit tight around the groin. The back zipper does fall down abput an inch doesnt let water in when it does this just have to sometimes pull it back up every so often.. is annoying but I also have a fairly wide back to cause this. Water drains good and keeps me warm. In North Florida so the water doesn't get to cold. But cold enough. I'd purchase again or recommend to a friend. ... show more
Reviewed in the United States on December 24, 2022 by Chris S.
    • 6’4 195 and LT fits like a glove
Size: Large Tall Color: Black/Black Pattern Name: Full Wetsuit
Review Image by Alex R
I’m new and haven’t put it to the test yet. at my height and weight, finding a suit was a bit of a chore. This felt very good, it was more flexible than others I tried and great quality. It fit from head to ankles and was the right torso length. It is incredibly warm so I’m comfortable it will perform well in the water. I’ll. Try and put out an update when I test it. Update, I did a few dives at 70deg and was relatively comfortable. The third dive I was feeling the cold. I naturally get cold easily. ... show more
Reviewed in the United States on September 20, 2023 by Alex R
    • 2 years and 200 dives in this suit
Size: XX-Large Color: Black/Black Pattern Name: Full Wetsuit
I've had my XXL suit for about 2 years, wear it for scuba diving bc ONeill suits are the most flexible of all. I'm about 6ft, 225 lbs. I've done about 200 dives in this wetsuit and it's holding up great. I can zip it up easily by myself. It's been an excellent purchase and I can recommend it.
Reviewed in the United States on January 10, 2026 by CCC
    • Great fit!
Size: Large Tall Color: Black/Ocean Pattern Name: Full Wetsuit
I'm 6'3" and have trouble finding a wetsuit long enough for me - until now... This fit perfectly. Long enough for both my arms and legs and didn't fit like a tent around me. Highly recommended for tall, slender men.
Reviewed in the United States on November 15, 2025 by Farmer
    • Excellent quality, didnt disappoint.
Size: XX-Large Color: Black/Black Pattern Name: Full Wetsuit
Excellent
Reviewed in the United States on March 29, 2026 by Alejandro Rossi

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