O'Neill Men's 4/3MM Epic Back Zip Fullsuit Wetsuit O'Neill Men's 4/3MM Epic Back Zip Fullsuit Wetsuit

O'Neill Men's 4/3MM Epic Back Zip Fullsuit Wetsuit

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Hit the waves in the O'Neill Men's 4/3MM Epic Back Zip Fullsuit and experience a durable, comfortable construction that... Read More
SKU: 4212 Product Code: 8123666

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    Hit the waves in the O'Neill Men's 4/3MM Epic Back Zip Fullsuit and experience a durable, comfortable construction that will keep you warm in the cold waters. With clean graphics and sharp style lines, the Epic wetsuit offers the best quality for the best value.


    • 4/3mm neoprene.
    • 100% SuperStretch material: 50% UltraFlex DS / 50% FluidFlex.


    • For water temperatures 50-59°F.
    • Blackout Zip: Offset zipper to reduce water entry.
    • External key pocket along the lower leg inseam for easy access and secure storing.
    • Firewall Insulation: Lightweight thermal insulation jersey that wicks away moisture and enhances warmth.
    • GBS Seams: Double stitched and triple glued seams for watertight construction. Tape added to critical areas.
    • Krypto Knee Pads: An abrasion-resistant, high-stretch neoprene panel with ergonomic shaping for durability and knee protection.
    • Strategic Paddle Zones: An ergonomic, seamless undersleeve panel offering unrestricted motion and eliminating rashes.
    • Lumbar Seamless Design (LSD): Offers minimized water entry and maximized stretch for enhanced comfort.

    Country of Origin

    • Imported

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  • 4.5 Review Stars (13 Reviews)

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  • 6/10/2021 Great quality at reasonable price point

    5 Review Stars By John B

    This suit meets my needs and overall is a great quality product at a fair price. The construction and materials used a high-quality. The suit is easy to get on and off. I use it in 50 to 65° waters and find that it keeps me nice and warm. When wearing the suit I have good movement both in and out of the water.

    John B

  • 12/16/2014 Loves it!

    5 Review Stars By Kari c.

    Gift for my husband who is always cold, even in our So Cal waters. Perfect fit, Keeps him warm. Fast shipping!!

    Kari c.
    San Jacinto, CA

    Fit: Feels true to size

  • 3/4/2021 Leg seam ripped in first 10 uses

    1 Review Stars By William

    I purchased this suit for winter surfing, and within my first 10 uses with the suit the seam on the leg ripped. I was just putting the suit on as designed, and the seam tore about 5" right in the middle of the leg. Would not buy again.

    San Francisco, CA

  • 6/29/2015 O'Niell 4/3

    4 Review Stars By Lee

    Very satisfied with the wet suit.

    San Diego

    Fit: Feels true to size

  • 7/9/2020 Great Wetsuit!

    4 Review Stars By Wave Glider

    O'Neill makes the best wetsuits in my opinion. This specific model is well worth the price and just as good as the higher priced models. I'm 5'10" and 190 lbs, and the suit fits just perfect. If you're any taller and or heavier, be careful, as this suit runs a tad tight.

    Wave Glider
    Nor Cal

    Fit: Feels true to size

  • 7/30/2015 Perfect

    5 Review Stars By CHERNGYWH

    Perfect fit, great quality

    San Jose, CA

    Fit: Feels true to size

  • 12/24/2019 Everything I thought it should be!

    5 Review Stars By Ibroosez

    I purchased this item for a dear friend. It was a perfect fit and they couldn’t be happier with their surprise.

    Charleston, SC

  • 12/10/2018 Great service

    5 Review Stars By Fiesty

    The suit I ordered was to small for me. I returned it. SwimOutlet was out of the size I needed. Thank you SwimOutlet for your excellent service and prompt return of funds. Your honesty is much appreciated and valued. I will defiantly continue to shop with them.

    Orlando, Fl

    Fit: Feels too small

  • 8/26/2018 For swimming in a very cold alpine lake

    5 Review Stars By Laure

    Took the edge off in a snow melt alpine lake.  Purchased a Large/Tall for a 6'4'',160 pound teen boy.  It fit his length very well.  It was big in upper body, but that was expected from the size chart.  I anticipate that it will fit perfectly when he fills out.  Note: A Medium/Tall would not have fit his body length.


    Fit: Feels true to size

  • 4/12/2018 great wetsuit, keeps me xtra warm to stay out longer,

    5 Review Stars By Tom

    great flexibility, light weight and dries quickly, goes on and off with little effort, I miss the velcro that goes under the zipper to stop it from slipping down. Can't complain, Best suit for surfing and warmth.

    San Diego, Ca

    Fit: Feels true to size

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About This Brand


Jack O'Neill began surfing in 1952, before functional surf apparel was invented. While working for the Army Air Corps, O'Neill discovered neoprene foam in a DC-3 airplane. He then combined the neoprene carpeting with duct tape to create the first neoprene wetsuit.

Demand for O'Neill's neoprene wetsuits grew rapidly and he began a business selling the O'Neill wetsuits out of his garage. By 1980, he was a leader in the beach apparel industry with a thriving business. Since then, O'Neill™ has become a widely recognized and respected brand in the surf industry, continually creating new and innovative products. In addition to O'Neill wetsuits, they carry O'Neill boardshorts, O'Neill dresses, O'Neill hats, O'Neill rash guards, O'Neill swimsuits, O'Neill water shoes, O'Neill sandals, O'Neill life jackets and O'Neill t-shirts.

In addition to his business success, O'Neill also created a non-profit foundation for kids. O'Neill developed the O'Neill Sea Odyssey Program: a free, educational cruise that introduces kids to the microbiology of the Monterey Bay Marine Sanctuary, beginning at Jack O'Neill's doorstep.