Best Men's Activewear Undershorts Under $100 (2026)
We ranked under-(price varies) undershorts by fabric technology, inseam variety, fit features, construction quality, and overall value score
The Verdict
- Best Overall: Under Armour men's multi-pack standard tech 6" boxer brief — Best everyday active pick: reliable moisture-managing fabric and a classic 6" inseam for versatile workouts and daily wear
- Best Value: Under Armour men's tech long-leg boxer brief 9" inseam — Best long-leg option: 9" inseam delivers extended coverage and chafe protection for running and cycling
Top Picks
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1
Best Overall Under Armour men's multi-pack standard tech 6" boxer brief
Best everyday active pick: reliable moisture-managing fabric and a classic 6" inseam for versatile workouts and daily wear
Soft, breathable boxer briefs with mesh fly panel, stretch fabric, and moisture-wicking performance. Customers note a comfortable fit with smooth fabric, though some report riding up and sizing variation
- moisture-wicking performance
- 4-way stretch for mobility
- wide waistband with metallic wordmark
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2
Best Value Under Armour men's tech long-leg boxer brief 9" inseam
Best long-leg option: 9" inseam delivers extended coverage and chafe protection for running and cycling
Breathable, moisture-wicking long-leg trunks with four-way stretch and seamless design for comfort. Customers note soft feel, secure fit, and long length against chafe
- seamless comfort
- long 9" inseam
- moisture-wicking performance
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3
Men's Tech 6" Boxerjock multipack
boxerjock: athletic cut with tech fabric that emphasizes breathability and support in a compact package
Men's Under Armour boxer briefs with breathable mesh, four-way stretch, and moisture-wicking fabric. Noted for comfort and quality construction, with some users reporting mixed fit and durability variations
- breathable, soft fabric
- seamless comfort
- moisture-wicking
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4
Under Armour Performance Tech Long-Leg Boxer Brief 9" Inseam
Best performance long-leg: engineered for sustained activity with tech fabric and a supportive longer inseam
Performance tech long-leg boxer briefs with breathable fabric and mesh fly panel. Comfortable, moisture-wicking, with 4-way stretch. One customer notes great length and stay-in-place fit
- moisture-wicking fabric
- 4-way stretch
- all-day comfort
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5
Under Armour men's multi-pack performance tech long-leg boxer brief
Best pack for rotation: multi-pack long-leg design balances tech fabric performance with more coverage for workouts
Breathable, soft boxer briefs with a 9" inseam and seamless sides for comfort. Customers note great length and staying power during runs
- seamless comfort
- 4-way stretch
- moisture-wicking quick-dry
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6
Under Armour men's multi-pack standard tech 6" boxer brief
Best classic fit multipack: consistent 6" inseam and moisture-wicking tech fabric for everyday training needs
Breathable, soft boxer briefs with a 6" inseam and no side seams for comfort. Fabric wicks sweat and dries fast, with a 4-way stretch for movement; customers note smooth fabric and comfortable waistband
- 4-way stretch construction
- moisture-wicking fabric
- seamless comfort waistband
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7
Under Armour men's multi-pack standard tech 6" boxer briefs
Best active staple: dependable 6" boxer-brief fit with breathable performance fabric for frequent wear
Soft, breathable boxer briefs with mesh panel, no seams, and 4-way stretch for comfort. Customers praise the smooth fabric and comfortable fit
- seamless comfort
- moisture-wicking fabric
- secure waistband
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8
Under Armour Men's Multi-Pack Tech Boxer Briefs (6" inseam)
Best mid-range multipack: tech fabric and a standard 6" inseam that combine comfort and performance for regular use
Under Armour boxer briefs with soft, breathable fabric, mesh fly panel, and seamless sides for comfort. Customers note soft texture, good fit, and wide waistband
- soft and breathable
- seamless comfort
- moisture-wicking
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9
Under Armour men's multi-pack boxer briefs, 6" inseam
Best athletic brief set: engineered for movement with a 6" inseam and performance-focused fabric construction
Lightweight performance boxers with soft, breathable fabric and tagless comfort. The wide waistband provides a smooth fit, with 4-way stretch for movement
- soft, breathable fabric
- tagless for comfort
- 4-way stretch for movement
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10
Under Armour performance tech long-leg boxer briefs, 9" inseam
Best extended coverage: 9" performance long-leg option that reduces thigh friction during intense activity
Under Armour men's multi-pack performance long-leg boxer briefs with breathable fabric, mesh panel, and 4-way stretch for all-day comfort. Customers note soft feel, good length, and staying in place during runs
- 4-way stretch for movement
- seamless sides and back for comfort
- moisture-wicking and quick-drying