Skip to product information
1 of 8

CoreFlex Boys - Black

CoreFlex Boys - Black

“Everytime I wash the shorts, my son is ready to wear them again.”
Veronica D.
CHOOSE YOUR DEAL Mix styles + sizes
SIZE FOR PAIR 1

Between sizes? Size up. Your first exchange is free.

Need help choosing a size?
THE EYRX STANDARD
Built to become the pair they reach for. Easy to get the fit right.
FREE
SHIPPING
FREE 1ST
SIZE EXCHANGE
EASY
30-DAY RETURNS
HOW THE STANDARD WORKS

Free Shipping. Every order ships free within the U.S.

Free First Size Exchange. Ordered the wrong size? Your first size exchange per order is on us. Items exchanged for size must be unworn and unwashed.

Easy Returns. Not right for your athlete? Return unworn, unwashed items within 30 days of delivery for a refund to your original payment method.

A feature stack that finally stacks up.

  • ✓ Four-way stretch
  • ✓ Secure zipper pocket
  • ✓ Deep pockets
  • ✓ Lightweight & breathable
  • ✓ UPF 50+
  • ✓ Odor-resistant fabric

Reflective details · 90% polyester / 10% spandex

EYRX exclusive · Size-Up Reward

Outgrow the shorts. Get $20 toward the next bundle.

Get $20 off your next bundle after a qualifying CoreFlex 2-pack or 4-pack purchase.

Eligibility & terms

One reward per household per 12 months. Eligibility and expiration terms apply.

View Size-Up Reward terms

Free standard shipping on every order. Easy returns & exchanges

View full details

WHY THEY KEEP REACHING FOR EYRX

THE Athlete CAME FIRST.

Youth athlete wearing Eyrx CoreFlex performance shorts

01 · START WITH THE Athlete

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 shorts with performance-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
Jesse coaching youth basketball, founder of Eyrx JESSE ON THE SIDELINES

WHY EYRX

BUILT FROM THE SIDELINES. NOT THE BOARDROOM.

“I kept watching youth athletes adapt to gear that should have been adapting to them.”

Most performance gear starts with the product. We wanted to start with the person wearing it.

After years coaching and raising youth athletes, that meant starting with the athlete in front of us. How they move. What they notice. What they actually choose to wear.

JESSE · FOUNDER OF EYRX

COACH-LED Shaped by years inside youth sports.
ATHLETE-FIRST The youth athlete is where the design starts.
FAMILY-FIRST Designed to work for the athlete and the family.

REAL-WORLD PROOF

WHAT SPORTS FAMILIES ARE SAYING

  • 5 stars: 5 (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.
D
Daniel D.

I know these are meant to be athletic shorts, but my son likes to be comfortable, and says he prefers these for comfort even for casual wear. Recommend these for their high quality.

V
Veronica D.

Love these shorts! They are very comfortable and great while playing various sports.

Everytime I wash the shorts, my son is ready to wear them again...which is a such great sign!!

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!