O’Neill Reactor II Wetsuit – Series Overeview

Reactor II by O’Neill is one of the most popular surf wetsuits on the market. There are so many model variations for everyone out there. It’s a great spring/summer entry-level wetsuit that comes in many different shapes, sizes, and designs.

O’Neill is the oldest wetsuit manufacturers out there – well known for its large range of sizes and models at an affordable price tag. As the Reactor series is originally designed for such high activity-sport as surfing, many people also use it on all sorts of other water-related activities such as snorkeling, swimming, freediving, sailing, kayaking and so on.

oneill company logo


Table of Contents

O’Neill – Reactor 2

How To Choose





Why get an entry-level surf wetsuit? It’s an ideal choice for “Sunday surfers” or for any other warm-water activities. Don’t get me wrong – The Reactor is widely used among experienced surfers as well due to its’ simplicity and durability.

Related Reviews

O’Neill O’Riginal – Awesome mid-range surf wetsuit
O’Neill Epic – Another great mid-range wetsuit by O’Neill
O’Neill HyperfreakTop-range O’Neil surf wetsuit full overview with all the models and sizes
O’Neill Psycho – Another awesome high-tech performance-driven wetsuit


O’Neill Reactor 2 Review

Reactor II is the updated version of the Reactor

Reactor II is engineered for performance in a value-driven package. A fresh combination of stretch and durability. Fresh colors and graphics with style that’s built to last.

Model availability:

  • 1mm | 1.5mm | 2mm | 3/2
  • Back-zip | Front-zip
  • Top | Pull-Over Vest | Long-Sleeve Jacket | Shorts | Shorty | Long Jane | Long John | Full Suit


  • UltraFlex/FluidFoam Neoprene Combination
  • Mesh smooth skin
  • Fluid foam chest & back
  • Dry seal smooth skin
  • Fluid foam neck
  • Hidden key pocket
  • YKK zip system

Washing instruction: Rinse with cool water and drip dry out of direct sunlight


  • 100% UltraFlex DS neoprene
  • High-performance super-stretch neoprene with a durable outer skin that resists velcro pulls and snags
  • Stretch factor: 150% which means it stretches up to 1/3 out of its original fit for perfect fitment
  • Flatlock stitched – The most popular method of sewn construction. The stitch uses 4 needles and 6 threads and works by overlapping the neoprene panels and sewing them together. It is a strong stitch and is very comfortable because it is flat, but it is not a sealed seam so it is not intended for extremely cold conditions.
  • Strategic seamless paddle zones An ergonomic, seamless undersleeve panel that allows for unrestricted motion and eliminates rashing. Flexible and unique design that utilizes minimal seam placement for comfort.
  • Krypto knee pads Abrasion resistant, high stretch neoprene panel with ergonomic shaping for comfortable durability. The flexible and unique design utilizes an extended knee pad for added durability.


Anywhere from $70 up to $200

O’Neill Reactor 2 CONS:

  • The flatlock stitching lets water come through, but that’s expected to any suit with that type of stitching
  • It’s an entry-level summer/springsuit with basic technology and limited thicknesses


Price: 5/5
Technology: 3/5
Flexibility 3/5
Design: 3/5
Sizes: 5/5
Types: 5/5

Total Score: 4/5

What I personally like the most about the Reactor series is that it features a ton of different sizes for everyone – from toddlers, boys&girls, and up to men with a beer barrel. After reading a ton of reviews, most people find it very comfortable and well-fitting.

a single wave

Key Factors When Choosing A Wetsuit

  1. TYPE – Determine which type of wetsuit do you need: A top, short sleeve top, or a full suit.
  2. THICKNESS – Choose the right thickness for the season.
  3. SIZE – Make sure you get exactly the right size. When you have to choose between two sizes, weight is more important!

o'neill wetsuit thickness chart

Thickness & activity recommendations

  • 1mm – Comfortable for summer use only

Snorkeling, Swimming, Kayaking, Surfing, Stand-Up Paddleboarding, Kiteboarding

  • 1.5mm – Warm weather activities

Snorkeling, Swimming, Kayaking, Surfing, Stand-Up Paddleboarding, Kiteboarding, Sailing

  • 2mm – Summer suit. An ideal choice for those in-between weathers where 1mm would be too cold and 3mm too restrictive. Perfect for freediving as it’s not that thick and floaty.

Snorkeling, Swimming, Kayaking, Surfing, Stand-Up Paddleboarding, Kiteboarding, Freediving, Diving, Sailing

  • 3/2 – Springsuit. Great for those late spring/early autumn frisky sessions


O’Neill Reactor 2 For Men

o'neill reactor 2 models for men

Sizes from 168cm to 193cm / 5’6″ to 6’4″
52kg to 122kg / 115 lbs to 270lbs

Men’s O’Neill Reactor 2 Size Guide

o'neill wetsuit size guide for men


O’Neill Reactor 2 for Women

o'neill womens reactor 2 wetsuit models

Sizes from 155cm to 183cm / 5’1″ to 6’0″
40.75kg to 84kg / 90lbs to 185lbs


Women’s O’Neill Reactor Size Guide

o'neill womens wetsuit size guide


O’Neill Reactor 2 Models for Youth

o'neill reactor 2 youths wetsuit models

Sizes from from 2’10.5″ to 5’7″ / 87cm to 170cm
25lbs to 135 lbs / 11kg to 61kg

Youth’s O’Neill Reactor 2 Size Guide:

o'neill youths wetsuit size chart


O’Neill Reactor 2 For Toddlers

o'neill youths reactor 2 wetsuit models

Want your wetsuit to last? Check out our wetsuit care guide.

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I created Nulltuul to share my experience, research and analysis with other surf enthusiasts out there. If I'm not surfing on my travels - I like to photograph waves, surfers, and the surf lifestyle in general.

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