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The short answer: To pick men’s running shorts, focus on inseam length for your stride, liner comfort for chafe control, waistband security, pocket practicality for your carry needs, and fabric breathability for your climate. Tradeoffs exist between weight, storage, and durability.
Inseam directly affects your range of motion and coverage. Shorter 5 inch shorts give full freedom for fast strides and hot days. They reduce fabric bunching but show more leg. 7 inch is the most versatile, balancing coverage and mobility for most runners. 9 inch offers extra coverage and a more conservative look but can feel restrictive on long runs. Longer inseams also add weight and can trap heat. For trail running or if you have thicker thighs, a 5 inch may ride up less than a 7. If you prefer compression shorts underneath, consider a 5 inch outer shell. Always test with a few strides in store or order multiples to compare.
Built in liners provide support and reduce the need for extra underwear. Most liners are brief style with a mesh or soft polyester. They can cause chafing if the seam placement doesn’t match your body. Some runners prefer a compression short liner (like 2 in 1 shorts) for extra muscle support. Linerless shorts let you choose your own underwear, which can be ideal if you have a preferred brand. Tradeoff: linerless shorts require you to buy separate underwear, adding cost and laundry. For long distance runs, a high quality brief liner often prevents chafing better than boxer briefs. Check for flatlock seams and moisture wicking fabrics in the liner area.
A secure waistband prevents shorts from slipping during runs. Basic elastic waistbands with an internal drawstring are common but can loosen over time. Flat drawstrings that tie flat reduce bulk under a shirt. Some shorts have an integrated belt with a buckle for micro adjustments, ideal for race day when you want zero movement. Drawstrings can dangle and annoy some runners. Elastic bands without drawstring may stretch out after washing. Look for a waistband that sits comfortably at your natural waist without pinching. For runners who carry a phone, a wider waistband with a key pocket can distribute weight better.
Pocket placement and security matter. Drop in pockets at the sides are the lightest and best for gels or keys but can bounce. Zippered pockets keep items secure but add weight and can slap against your leg. A center back zippered pocket (often with a small flap) is great for a phone or card and stays centered. Some shorts have a small internal key loop. For long runs, a pocket that fits a modern phone (6.5 inch screen) is essential. Cargo pockets on running shorts are rare and usually too heavy. The tradeoff: more pockets mean more fabric and potential chafing. Minimalists prefer one secure back pocket. Test pocket depth with your actual phone before buying.
Fabric weight is measured in grams per square meter (gsm). Lightweight shorts (90 120 gsm) are best for hot weather and speed work but may be see through when wet. Mid weight (120 150 gsm) offer durability for trail running and everyday use. Mesh panels or side splits improve airflow but can snag on branches. Some shorts have a DWR (durable water repellent) coating for light rain but it wears off over time. Polyester and nylon blends are standard; elastane adds stretch. Avoid cotton as it absorbs sweat and causes chafing. For cold weather, a slightly heavier fabric with a soft interior is better. Always check reviews for how the fabric holds up after multiple washes.
How many pairs of running shorts do I need? If you run 3 4 times per week, 2 3 pairs allow rotation and washing. For daily runners, 4 5 pairs ensure you always have a dry option. Rotating shorts extends their lifespan by letting elastic recover.
Can I wear running shorts for other sports? Yes, many running shorts work for gym workouts, hiking, or casual wear. However, cross training might need more durable fabric and side pockets for a phone. Pure running shorts often lack the reinforced seams needed for weightlifting.
What is the best inseam for a beginner runner? A 7 inch inseam is generally the most forgiving. It offers enough coverage for confidence while still allowing free leg movement. As you gain experience, you can experiment with shorter or longer lengths based on comfort.
For more details on top rated models and side by side comparisons, check out our guide: We Tested the Best Men’s Running Shorts for 2026. It covers specific picks for different budgets and preferences.
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