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CoreFlex Boys - Black

CoreFlex Boys - Black

$58.00 USD
$58.00 USD
Sale Coming Soon
Shipping calculated at checkout.

Built from the ground up for boys.

Performance features made for the way kids actually live.

Founder Built · Kid Tested
Designed by a youth sports coach and parent because most gear wasn't built around kids.
4-Way Stretch
Moves with them.
Deep Pockets + Zipper Pocket
Real storage for real life.
UPF 50+
Sun protection built in.
Breathable + Odor Resistant
Fresher between washes.
Reflective Details
Added visibility after dark.
Lightweight Performance Fabric
90% polyester / 10% spandex.
↑
Exclusive Eyrx Benefit
Size Up Reward
Buy a qualifying bundle and get $20 toward their next bundle when they grow.
Easy Returns
30 days. Original condition.
Built for Youth Athletes
Designed around real movement.
Not sure? We size by height.
Find the Right Fit.
Not sure between two sizes?

We recommend going with the larger size for growing athletes. CoreFlex shorts are designed with room to move, not a tight athletic fit.

Boys True to Size
Measurement XS S M L XL
Height (in) 46.5–49.5 52–55.5 55.5–58.5 61.5–64 66.5–69
Weight (lbs) 42–58 61–71 71–100 101–125 125–146
Waist (in) 23–24 24–26 26–28 28–29.5 30–32
Hip (in) 25–26.5 27–28.5 29–30.5 31–33.5 34–36.5
Inseam (in) 3 3.5 4 4.5 5

Height and weight are the most reliable sizing indicators. Waist and hip measurements are body specs, not garment measurements.

Girls Fits Generously — When in Doubt, Size Down
Measurement XS S M L XL
Height (in) 46.5–50.5 52.5–55 55–58 61–62.5 62.5+
Weight (lbs) 45–55 61–71 72–95 99–120 118–142
Waist (in) 23–23.5 24–25 25–26 28–30 32–34
Hip (in) 25–27.5 28.5–30 30–32 34–36 38–40
Inseam (in) 2 2.5 3 3.5 3.5

Height and weight are the most reliable sizing indicators. Waist and hip measurements are body specs, not garment measurements.

Stock the Season
Buying for multiple kids? Families save more with bundles — mix any colorways, discount applied automatically at checkout.
View full details

WHY THEY KEEP REACHING FOR EYRX

THE kid CAME FIRST.

Youth athlete wearing Eyrx CoreFlex performance shorts

01 · START WITH THE KID

WE BUILT THE SHORTS AROUND THE athlete.

Fit, proportions and comfort built around how youth athletes actually move.

Your performance fit
Close-up of soft Eyrx CoreFlex performance fabric

02 · FEELS LIKE THE FAVORITE

BUTTERY-SOFT FROM THE FIRST WEAR.

Performance fabric that feels good the moment they put it on.

SOFT PERFORMANCE FABRIC
Eyrx CoreFlex performance shorts with kid-specific details

03 · DETAILS THAT FIT THEIR LIFE

BUILT FOR THE WAY ATHLETES LIVE.

Useful details for practice, school, the driveway and everywhere in between.

ZIPPER POCKET · ANTI-ODOR · UPF 50+ · REFLECTIVE

THE DRAWER TEST

Does your gear pass
the drawer test?

Most shorts are built to hit a price point. Ours are built for the athlete wearing them.

The real-life test Eyrx CoreFlex Typical youth shorts
They won't wear it twice Most youth gear gets rejected the first time it does not feel right. Ultra-soft from the first wear Basic fabrics or inconsistent feel
Play does not stop when the sun goes down Evening games and low-light practice are part of the routine. Reflective details built in Rarely included
Same shorts. Two days in a row. Athletes wear what they love. Parents know what that means. Anti-Odor Rarely included
Long days in the sun Tournaments, outdoor practice, and recess add up fast. UPF 50+ Inconsistent or untested
The fit that does not fit Most youth gear starts as an adult product and works backwards. Designed and tested with youth athletes Often scaled down from adult patterns
Size-Up Reward Eyrx exclusive They grow. Most brands move on. We planned for it. Buy a bundle, get $20 reward toward your next bundle* One-and-done purchase

Comparison reflects Eyrx product design versus typical feature availability across major-brand youth performance shorts. Features vary by brand and product line.
*Size-Up Reward applies to qualifying purchases. See full terms for details.

Comfort

If it's not soft, it stays in the drawer.

Eyrx Ultra-soft from the first wear
Typical shorts Basic fabric or inconsistent feel

Long days outside

Tournaments, practice and recess add up fast.

Eyrx UPF 50+
Typical shorts Sun protection is inconsistent or untested

Repeat wear

The favorite pair should survive repeat wear.

Eyrx Anti-odor
Typical shorts Rarely included in youth gear

Growth

They grow. We planned for it.

Eyrx exclusive $20 Size-Up Reward on your next bundle
Typical shorts One-and-done purchase

*Qualifying purchases. See full terms.

Reflective details 4-way stretch
  • 5 stars: 3 (100%)
  • 4 stars: 0 (0%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
Some of the reviews shown are from related products the merchant grouped with this one.
J
Julia F.

Or My son absolutely loved these shorts! He said they were so comfy and soft—and he actually wore them to bed 😂 Definitely a hit with him!

S
Steve C.

These shorts have quickly become a favorite for basketball practice, training, and everyday wear. They are comfortable, fit well, and allow for plenty of movement on the court. They also have a really nice look that makes them easy to wear outside of basketball too.

As a parent, I appreciate that they feel like they were made specifically for young athletes. The quality is great, the design is sharp, and they have held up well through regular use. Most importantly, they are shorts that my son genuinely enjoys wearing and chooses often.

We have been very happy with them and would definitely recommend Evrx to other families looking for quality basketball gear for their kids. We will absolutely be ordering more!

R
Richard L.S.

My kid is currently going through a huge Greek kick. He listens to the Greekin’ Out podcast daily. Needless to say that he immediately fell in love with the ‘Bolt’ color-way as it reminded him Zeus. Independent of his Greek obsession he’s super picky with shorts. He chafes extremely easily and with his Eyrx shorts — the material is incredibly soft and properly wicks sweat. He doesn’t want to take them off. NO MORE CHAFING! So if you’re looking for a pair of athletic shorts that stretch, are cozy, have awesome designs, and decrease the stink — look no further! Would absolutely buy again!