Men's Shorts

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Shop men’s gym shorts and men’s running shorts built for training, movement and everyday performance at O’Neills. Our range includes lightweight sports shorts, lined and 2-in-1 styles to help you stay comfortable through gym sessions, runs, team training and recovery days.

Men’s Gym Shorts For Training

The right men’s gym shorts should help you move freely, stay comfortable and focus on your session. Whatever your discipline, lifting, stretching, conditioning or working through a circuit, O’Neills gym shorts are made for active movement and regular training.

Our collection includes versatile men’s training shorts for different workout styles and sports, from lightweight options for high-intensity sessions to everyday shorts you can wear before, during, and after training. Pair them with men’s sports tops and t-shirts for a simple, breathable gym kit that works across strength, cardio and team training.

Or, if you prefer extra coverage or support, you could layer your shorts with our range of men’s baselayers and compression clothing to help you feel secure through every rep, sprint and drill.

Discover more in our ultimate guide to O’Neills shorts.

Running Shorts For Performance

When you’re running, your shorts need to feel light, comfortable and distraction-free. O’Neills men’s running shorts are designed to support natural movement, so you can focus on the route, trail, track or road. 

No matter your distance, make sure your shorts are made with breathable fabrics, comfortable elasticated waistbands, and practical fits that reduce restriction as you move. 

Shorter styles, like our Tempus Woven shorts and Hero shorts, can work well for faster sessions, while longer men’s sports shorts may suit general training, gym work or outdoor workouts.

For a full running kit, explore our men’s running clothes collection, where you can build your outfit with running tops, layers and outerwear designed for changing conditions.

O’Neills men’s gym and running shorts are available in various in-seam sizes, catering to different leg lengths and preferences. Our range includes: 

2-In-1 & Lined Shorts

2-in-1 men’s running shorts are a popular choice if you want a lightweight outer layer with a supportive inner liner. This combination gives you freedom of movement, from the outer layer, while the inner short adds coverage and support during runs, gym workouts or high-intensity training.

Lined options, such as our Nitro 2-in-1 shorts, can be especially useful for running, conditioning and drills where you want to reduce fabric movement and feel more secure. These shorts can also remove the need for a separate compression layer, depending on your preference.

If you like a closer, more supported fit, choose O’Neills lined 2-in-1 shorts. However, if you prefer a looser, more relaxed feel, or you play a sport like GAA, our iconic Mourne Shorts may be the better option.

Choosing The Right Shorts

Choosing the right men’s workout shorts depends on how you train. For weights sessions, look for roomier or more flexible shorts that let you squat, lunge, stretch and lift without restriction. If you’re running, prioritise lightweight materials, secure waistbands and a fit that does not rub or distract over distance.

For team training, like football or GAA, you may want durable men’s sports shorts that can handle repeated movement, warm-ups and outdoor sessions. For rest days or travel to and from training, a comfortable pair of shorts works well with O’Neills’ range of men’s hoodies and sweatshirts.

Features To Look For When Buying Men’s Shorts

Good men’s gym shorts should feel comfortable as soon as you put them on, but they also need to perform when your training session or run gets harder. 

To find the right shorts, look for breathable, stretchy fabrics like nylon or polyester – these help manage heat and offer a flexible construction that supports movement. 

For running, lightweight materials and secure waistbands are key. For gym work, you may prefer a slightly longer cut or a bit more stretch. For all-round training, choose shorts that can move easily between cardio, lifting, sport and recovery.

You should also consider practical details, like pockets. If you’re a runner and you need somewhere to store your keys or phone, think about pocket placement and if you’d prefer to zip things away. 

When you buy men’s gym shorts from O’Neills, you get peace of mind that all of these things have been considered and factored into the composition of our sportswear, ensuring you can perform to the best of your abilities.

FAQs About Gym Shorts

The best running shorts are lightweight, breathable and comfortable over distance. Many runners prefer shorts with a secure waistband, minimal bulk and either a built-in liner or enough room to wear compression shorts underneath. Our range of men’s 2-in-1 running shorts has these built-in features. 

2-in-1 shorts combine a lightweight outer short with a fitted inner liner. The liner adds support and coverage, while the outer layer gives you the look and movement of a regular sports short. 2-in-1 shorts are popular for activities such as running, gym training, and high-intensity workouts.

Gym shorts don’t need to include liners, but they can be useful if you want extra support, coverage and security while training. Likewise, standard shorts may suit you better if you prefer a looser fit or already wear compression layers underneath.