Best Men's Athletic Underwear AI pick
Chosen by an AI model from its trained knowledge, with its reasoning.
AI pick (line): Saxx Kinetic
Saxx's internal support pouch and light-compression mesh keep things separated and dry through running, lifting and court sports better than a standard boxer brief.
Not for: Men who dislike a pronounced pouch or want a plain, flat-front brief look.
AI picks by need
For merino, odor resistance for multi-day wear
Icebreaker Anatomica (line)
Merino-blend fabric resists odor far longer than synthetics, so it suits travel and back-to-back training days.
Not for: Anyone who needs fast-drying, heavy-sweat durability or wants low-maintenance machine drying.
What the AI looks for in Men's Athletic Underwear
- Fabric
- Synthetic (polyester or nylon with elastane) or merino blend; avoid cotton for training Cotton holds sweat, gets heavy and causes chafing; technical fibers wick and dry quickly.
- Inseam length
- Longer leg (around 6 inches or more) for running and cycling; shorter leg for gym and court work A longer leg stops inner-thigh chafing and ride-up during repetitive stride motion.
- Seams
- Flatlock or bonded seams, especially along the inner thigh Raised seams are the main chafing point over long sessions.
- Pouch and support
- Contoured or internal-pouch front for high-impact sport Keeps everything in place and reduces skin-on-skin sweat contact.
- Waistband
- Wide, soft elastic that doesn't roll when bending Narrow bands roll and dig in during squats, cycling and sitting.
Brands that matter
- Saxx: Pouch-design specialist; Kinetic is the sport-focused line.
- ExOfficio: Give-N-Go is the long-running travel and sport standard.
- Under Armour: Wide range of synthetic boxerjocks and compression base layers.
- Icebreaker: Merino underwear for odor resistance.
- Smartwool: Merino base layers and underwear.
- lululemon: Premium athletic boxers with soft, stretchy fabrics.
What to avoid
- Cotton boxer briefs for running or long workouts
- Short-leg briefs that ride up under running shorts
- Thick, raised side or inner-thigh seams
- Loose woven boxers for high-impact sport
Questions
Do I need athletic underwear if my shorts have a liner?
No. A built-in brief liner replaces it; wearing both adds heat and chafing points.