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O'NEILL

O'Neill Men's Epic 4/3mm Back Zip Full Wetsuit

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Availability: In Stock.
Fulfilled by Amazon
Arrives Thursday, Mar 5
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Color: Black 2


Size: Medium


Description

Engineered for Men who want warmth in a suit that seals out water well for any water activity, the O’Neill Epic Back Zip Wetsuit combines advanced features with everyday reliability. Built using our high-performance stretchy neoprene, offering an excellent range of motion and lasting comfort, while the FluidFlex Firewall lining traps heat to keep your core warm in chilly conditions. The back zip entry system ensures easy on and off, while water-tight seams keep water out and increase durability. With features like the Double Super Seal Neck, Krypto Armor knee pads, and minimal seam design for flexibility, the Epic delivers outstanding performance, warmth, and value for water adventurers in all conditions and for all levels of experience.

Package Dimensions ‏ : ‎ 19.3 x 14.1 x 3.4 inches; 2.35 Pounds


Department ‏ : ‎ mens


Date First Available ‏ : ‎ October 6, 2008


Manufacturer ‏ : ‎ O'Neill Wetsuits


Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.:


Best Sellers Rank: #73,517 in Sports & Outdoors (See Top 100 in Sports & Outdoors) #55 in Full Wetsuits


#55 in Full Wetsuits:


Customer Reviews: 4.3 4.3 out of 5 stars (1,180)


Brand Name: O'NEILL


Sport Type: Kitesurfing, Snorkeling, Surfing, Swimming, Wakeboarding


UPC: 191015154151


Manufacturer: O'Neill Wetsuits


Item Type Name: Wetsuits


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


Included Components: Wetsuit


Item Thickness: 4 Millimeters


Size Map: Medium


Closure Type: Zipper


Sleeve Type: Long Sleeve


Material Type: Neoprene


Color: Black 2


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Mar 5

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

    • Good suit.
Color: Black/Black/Black Size: XX-Large
I wear it from 65Deg down to mid 50's without any additional layering. Very comfortable and stretchy.
Reviewed in the United States on January 11, 2026 by Liesureman
    • Great fit, great performance, one minor annoyance
Color: Black/Black/Black Size: XX-Large
XXL was perfect for 230lbs/6ft tall with a big belly/chest. I've never had a 4/3, but have decades of experience using thiner wetsuits and neoprene gear for different activities. Most of my stuff is around 2mm. It's crazy how warm 4mm is - I used this suit in 50-55F water and I couldn't even tell I was in the water. Only flaw with the product is the neck velcro easily gets stuck inside the suit and is very difficult to get un-stuck once the suit is on. I know what you're thinking: "they all do that." Not like this; the velcro absolutely welds itself deep inside your shoulder, even if you try to be careful about not dragging the flap in. This annoyance is worth it for the price; still a great value. No fault of the product, but the suit was sent in a box that was literally 6ft long, 3 inches deep, and around 30 inches across. This is obviously absurd, and might be a consideration depending on where you are sending the suit. Also, the suit had clearly been tried on and returned, which is a little gross, but fine with me. ... show more
Reviewed in the United States on November 1, 2023 by Cape Dory Sailor
    • Warm suit. Doesn't let cold water flush through the zipper !
Color: Black/Black/Black Size: X-Large
I'm 5'11" 205lbs kinda stocky. I've sometimes have to wear a XXL because of my shoulders & chest but then those suits are loose in the legs on me. This fit me perfect ! I was concerned that it doesn't have a bat wing under the zipper & usually this means cold water runs down my back " But that's not the case with this suit" zipper holds out the water really good! It's got fleece inside which keeps you warm in cold water. Great suit for the $ also they packaged it nice & it didn't come all wrinkled. I've had new suits come wrinkled from other suppliers as they put the suit in a huge box & it just flopped around during shipping. ... show more
Reviewed in the United States on April 7, 2024 by Amazon Customer
    • Fit & Usage
Color: Black/Black/Black Size: Large
Fit is true to size chart. I'm 6'3" 210 and suit fits very well. Bout this about 3-4 weeks ago. I have used this suit at least 15x now for work in temps ranging from 68° - 76° for multiple hours each time with no complaints. Warm with very little flushing. Zipper area you'll get some coolness from water intake but nothing your body won't be able to warm up very quickly. Temperature range I'd feel comfortable using this is from 65°- 78°. Lower than that you'll be chilly and need a long sleeve under armor style shirt, and higher you'll be too warm and need to constantly flush to be able to cool down. I do always wear a seperate CRESSI 3mm hood so keep that in mind. Seams are holding well, cuffs/ gaskets are tight but not uncomfortable. Good deal for a fairly priced wetsuit for general purposes and scuba. Spearfishing and freedivers save up and get a custom high-quality smoothskin (freediving) or open cell (spearfishing) both two pieces with built in hood. This suit is best used for watersports. I tend to get cold very easily so this wetsuit was a very pleasant suprise for being a 4/3. Perfect for any winter water temps in FL and any freshwater springs. ... show more
Reviewed in the United States on February 24, 2023 by Shadow
    • Nice Suit
I tried a few suits before I landed on this one. Perfect fit, very comfortable and warm but doesn't overheat me while I'm setting up on the beach. The glued seams make all the difference if you tend to run cold in stitched seams. Had no constrictions while surfing. With other suits I found I'd get a slight tugging that would lead my traps aching after a few hour session. With this suit I was comfortable the whole time and had no undue aches the next day (beside those from being rolled by waves). Great suit, would recommend! ... show more
Reviewed in the United States on August 31, 2020 by Josie
    • Does the job, quality could be better
Color: Black/Black/Black Size: X-Large
Update: downgrading to 1 star because after 5 more uses that thing really started falling a part. I found 6 more holes, all alone seams. I windsurf few weekends out of the month, between uses suit always dried and stored appropriately. I really see no reason why it would fall apart except that material usd is garbage. It does the job, fits well and very warm. Giving it 3 stars because of the manufacturing quality. I’ve used it handful of times over 2 years (on weekends, here and there) maybe 2 dozen time total. It still looks like new. The seam around knee pad, split the first time I put it on. After reading warranty, it seemed as such a hassle to send it for repairs so I just left it and was very careful putting that leg on. Today I noticed that seam in armpit splitting as well. I have been in water sports for almost 25 years now and O’Neil was always my go to brand but the quality of their product seems to get worse and worse. If you are looking for a quality product, this is not it. ... show more
Reviewed in the United States on April 7, 2018 by Maksim K.
    • I ordered down a size
Color: Black/Black/Black Size: MS
I am 5' 11 1/2 and 165 lbs. Took a chance and ordered the MS size because it had a big discount. Already owned a medium Oneill 4/3 suit and it fit well but let a bit of water in. This one is snug and pretty sure that no water will get in. Got it on and off with ease. Figure with a bit of use it will loosen up anyway. Very well built wetsuit. Happy with purchase. ... show more
Reviewed in the United States on January 5, 2024 by Self Radiance
    • Best of the best
Color: Black/Black/Black Size: Large Tall
Have been swimming in it for 2 years now, in San Francisco year around. Perfect size fit and comfort. I am 6’2”, athletic body type in the thin side, size LT.
Reviewed in the United States on December 7, 2025 by Albert Luppol

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