O'NEILL Men's 21 in Solid Boardshorts - Quick Dry Stretch Fit 56

In this review of the O'NEILL Men's 21 in Solid Boardshorts the bottom line is simple: these are reliable, below-the-knee swim trunks built for movement and quick drying. They suit men who want a comfortable, stretch-enabled boardshort that doubles as an active swim trunk. The reviewer found the Hyperfreak stretch and Hyperdry treatment genuinely useful for water sports and beach days, and the anti-rash Hyperthread construction keeps long sessions comfortable, making these shorts worth considering for regular swimmers and surfers.

Key Features

• 21 in outseam: The below-the-knee length gives fuller coverage and a classic boardshort silhouette for active beach use.
• Hyperfreak stretch: The four-way stretch fabric moves with your body so paddling, surfing, or running on the sand feels unrestricted.
• Hyperdry quick dry: Durable water repellent treatment speeds drying time so you can transition from water to land faster and more comfortably.
• Anti-rash Hyperthread: Flat seams and soft thread reduce chafing during long sessions in the water or on a board.
• Secure storage: A side zip pocket and velcro patch pocket keep small items like keys or cards safe while you are active.
• Practical fly: Velcro fly with a spandex gusset and drawstring closure ensures a secure fit when you are moving.

Who It's For

The O'NEILL 21 in boardshorts are best for men who want a functional swim trunk with performance features for surfing, beach workouts, or long days by the water. The stretch fabric and anti-rash construction make them particularly suited to surfers and swimmers who need freedom of movement without irritation.

Men who prefer a shorter cut or who only want casual swim trunks for lounging may want to look elsewhere, as these are a true below-the-knee boardshort designed with active use in mind. Also note sizing opinions vary, so those between sizes should consider trying the recommended size guide before buying.

Pros & Cons

Pros

• Comfortable four-way stretch fabric that adapts to active movement.
• Quick dry Hyperdry treatment reduces post-swim dampness and chill.
• Anti-rash construction enhances comfort during extended wear.
• Functional storage with a side zip pocket and velcro patch pocket.

Cons

• Sizing feedback is mixed, so fit may run slightly large for some customers.
• No inner mesh lining was noted by some reviewers, which may bother those who prefer a lined swim brief.

Specifications

Brand	O'NEILL
Outseam	21 in
Material	100% polyester with DWR treatment
Closure	Velcro fly with spandex gusset and drawstring
Pockets	Side zip pocket and velcro patch pocket
Technologies	Hyperfreak stretch, Hyperdry quick dry, Anti-rash Hyperthread
Imported	Yes

Our Verdict

The O'NEILL Men's 21 in Solid Boardshorts are a strong pick for active beachgoers who need stretch, comfort, and fast drying in one short. Given the performance fabrics, anti-rash details, and practical pockets, they represent good value for men who surf or spend long days on the water; just check sizing if you are between sizes.

Frequently Asked Questions

Do these boardshorts dry quickly?
Yes, the Hyperdry DWR treatment is designed for rapid dry time so they shed water faster than untreated fabric.

Are they lined?
These shorts use a spandex fly gusset and have no standard inner mesh lining noted, which some customers appreciated for feel and others may miss.

What length do they hit?
The outseam is 21 in, which falls below the knee on most wearers for full coverage and a classic boardshort fit.