O'Neill Men's Reactor-2 1.5mm Front Zip Long Sleeve Jacket - Warm

In this review the O'Neill Mens Reactor-2 1.5mm Front Zip Long Sleeve Jacket is evaluated as an entry-level, value-driven wetsuit top aimed at surfers, divers, and paddlers who need reliable warmth without a premium price. The single biggest reason to buy is its balance of stretch and insulation: the 1.5mm neoprene with wind-resistant smooth skin offers extra warmth and protection in cool conditions while still allowing freedom of movement for active water sports.

Key Features

• Front zip: The chest-entry zipper makes this jacket easy to put on and take off while reducing water flush compared with some back-zip tops.
• Strategic seam placement: Seams are positioned to improve comfort and reduce chafing during long sessions on a board or in the water.
• Hand-cuff stitch sleeve anchor: Sleeve anchors help keep cuffs secure and reduce riding-up when paddling or diving.
• Wind-resistant smooth skin: Smooth skin panels add a layer of insulation and block wind for better temperature control on breezy days.
• Stretch and durability: The updated Reactor-2 construction balances flexibility for mobility with enough durability for frequent use.
• Value focused: Engineered as an entry-level wetsuit jacket, it delivers core performance without the high cost of premium models.

Who It's For

The Reactor-2 is best for recreational surfers, paddleboarders, and snorkelers who need a lightweight, warm top for cool-water sessions or windy beach days. It is also practical for lake activities and casual diving where a full thick suit is unnecessary.

Serious cold-water divers or athletes who require a thicker suit or a highly refined seal system should look elsewhere, as this jacket is an entry-level option focused on comfort, mobility, and value rather than advanced thermal seals or heavy-duty cold-water protection.

Pros & Cons

Pros

• Provides noticeable warmth and comfort in mild cool water thanks to the wind-resistant smooth skin and 1.5mm neoprene.
• Good versatility for multiple water sports including surfing, diving, wake surfing, and paddle sports.
• Simple front-zip design and strategic seams improve ease of use and reduce irritation during activity.
• Offers solid value for the price as an entry-level wetsuit jacket with durable construction.

Cons

• Sizing can be mixed for longer torsos; some users find the large too short in the upper body.
• Several customers report the zipper quality and ease of use as inconsistent, which can make closing the front zip difficult at times.

Specifications

Product	Reactor-2 1.5mm Front Zip Long Sleeve Jacket
Brand	O'NEILL
Thickness	1.5mm neoprene
Closure	Front zip (chest entry)
Key materials	Wind-resistant smooth skin and stretch neoprene
Intended use	Surfing, diving, paddle sports, lake activities, beach days
Design highlights	Strategic seam placement and hand-cuff stitch sleeve anchor

Our Verdict

The Reactor-2 1.5mm front zip jacket is a practical, value-oriented pick for anyone needing a warm, flexible wetsuit top for a variety of water activities. It is best for recreational users who prioritize comfort, mobility, and wind protection; buyers who need precise sizing for long torsos or the highest-quality zipper may want to try fit options before committing.

Frequently Asked Questions

Is this jacket warm enough for diving?
Yes for shallow or warm-water dives and cooler summer conditions; it provides added insulation with smooth skin but is not a substitute for a thick cold-water suit.

Does the front zip keep water out?
The front-zip design reduces flush compared with some back-zip tops, but it is not a fully sealed dry system so some water ingress can occur during long submersion.

How does sizing run?
Sizing is generally true to size for many users, but people with long upper bodies should check length and consider trying a size up if concerned about torso fit.