Men's Shorty Wetsuit 2mm O'Neill Reactor 2

O'Neill Reactor 2 men's 2 mm shorty wetsuit with back zip

O'Neill Reactor 2 Men's Shorty Wetsuit 2 mm Back Zip

$98.00

$109.00

Men's Shorty Wetsuit for Summer and a Longer Season in the Water

The O'Neill Reactor 2 is a 2 mm men's shorty wetsuit for water of about 18 to 20 °C. It is made for SUP, surfing and swimming when the water is too cold for swim shorts.

O'Neill is known for precise cuts, so the shorty hugs the body and cold water does not flush in. There are no seams under the arms, so your shoulders move freely with every stroke.

It is the right choice when a full wetsuit is too warm, but after half an hour in boardshorts you start to shiver.

Who Is the O'Neill Reactor 2 Shorty For?

The Reactor 2 shorty is made for anyone who wants to stay in the water longer without getting cold.

We recommend it for:

swimmers who want to stretch their open-water season into autumn
pool swimmers who get cold during training
surfers on warm days in the Mediterranean
SUP paddlers on summer tours who end up in the water a lot
anyone looking for an affordable men's shorty wetsuit for the sea

O'Neill Reactor 2 Shorty Benefits

A cut that hugs the body
A close fit means water does not circulate between skin and neoprene.

Free shoulders
No underarm seams, so your swimming and paddling stroke stays unrestricted.

Warm core
2 mm on the torso protects against cooling during long sessions.

Zip it up yourself
The back zip has a long pull cord.

Sizes for taller builds
XS to 3XL, including tall MT and LT.

What water temperature is the Reactor 2 2 mm shorty for?

O'Neill recommends this thickness for water of about 18–20 °C. For 12–17 °C water, choose a 3/2 full wetsuit.

Material and Technology

The Reactor 2 is O'Neill's line for warmer water. UltraFlex neoprene is soft and stretchy, so the suit goes on easily and moves with you.

Flat, breathable flatlock seams do not rub and suit summer temperatures. For spring and autumn water, see the 3/2 full wetsuits among all our wetsuits.

Feature	Value
Thickness	2 mm
Cut	shorty, short sleeves
Zip	back zip with pull cord
Material	O'Neill UltraFlex
Seams	flatlock, no underarm seams
Water temperature	18–20 °C
Sizes	XS–3XL, MT, LT

Material and Care

Rinse in fresh water after every use, including after the pool. Dry it inside out in the shade on a wide hanger and never store it wet.

Why Choose O'Neill?

O'Neill has been designing wetsuits for more than 70 years: according to the brand, Jack O'Neill made the first surf wetsuit in 1952. O'Neill is known for precise, well-engineered cuts, which decide how well a wetsuit fits your body. The Reactor 2 brings that fit to an affordable price.

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How should the O'Neill Reactor 2 men's shorty fit?

The O'Neill Reactor 2 shorty should fit snugly, with no wrinkles on the torso and no air pockets in the lower back, but it must not squeeze your neck or restrict breathing. You will find exact measurements in the size chart; MT and LT have the same circumference as M and L but a longer torso.

Is the O'Neill Reactor 2 a suitable wetsuit for swimming?

Yes, the O'Neill Reactor 2 shorty is a suitable wetsuit for recreational swimming in a lake, the sea or a cold pool, as it has no seams under the armpits. However, it is not designed for competitive triathlon, where special swimming wetsuits are used.

Is the O'Neill Reactor 2 shorty suitable for wing foiling?

For wing foiling we recommend a full wetsuit, because your knees rub against the board when getting up and falling. The Reactor 2 shorty is a better choice for surfing, swimming and sup.

Shorty or full wetsuit – which should I choose for the sea?

According to O'Neill's recommendation, a 2 mm shorty such as the Reactor 2 is suitable for water between 18 and 20 °C. At 12–17 °C, choose a 3/2 full wetsuit.

What should I wear under the O'Neill Reactor 2 shorty?

Wear tight swimwear under the Reactor 2 men's shorty. Wide swim shorts bunch up under neoprene and can chafe.

What is the difference between the O'Neill Reactor 2 and Hyperfreak shorty?

The Reactor 2 is O'Neill's affordable line made of UltraFlex neoprene with flat seams. The Hyperfreak is the premium line made of lighter TechnoButter neoprene that absorbs less water, so it is better suited to those who spend a lot of time on the water.