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Coreflex Boys Short - Bolt

Coreflex Boys Short - Bolt

$58.00 USD
$58.00 USD
Sale Sold out
Shipping calculated at checkout.

Built from the ground up for boys — engineered for every sport, every practice, and everything in between.

Performance features adults can be jealous of.
Made for the way kids live.

JM
SR
+

First run. 500+ families already waiting.
4-Way Stretch Fabric — every sport, every move
Deep Pockets + Zipper Pocket — actually functional
UPF 50+ — outdoor coverage built in
Breathable, Odor Resistant — practice-ready all week
Reflective Details — evening rides, early mornings
90% Polyester / 10% Spandex shell — built to hold up all season

Stock the Season
Buying more than one? Families save more with bundles — discount applied automatically at checkout. No code needed.
Size up Reward
Buy a bundle, get $20 on your next when they grow
Easy Returns
Original condition with tags within 30 days
Built for Athletes
Designed for youth 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 Eyrx Exists
Built on
the sideline.
Our founder coaches youth sports. He couldn't find gear built for how kids actually move. So he built it.
The Standard We Set
Every feature
earned its place.
Every detail exists because a kid needed it on a field, a court, or a bike path — not because an adult assumed they did.
Built Different
Performance
kids deserve.
Performance features adults can be jealous of. Made for the way kids actually live, play, and compete.
The Difference

Built for real life. Proven in the details.

The Real Life Test
Eyrx CoreFlex
Typical Youth Shorts
They won't wear it twice Most kids' gear gets rejected the first time it doesn't feel right
Soft from the first wear, every time
Basic fabrics or inconsistent
Play doesn't 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. Kids wear what they love and 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 doesn't fit Most kids' gear starts as adult product and works backwards
Designed for kids, tested with kids
Scaled down from adult patterns
Size-Up Reward Eyrx Exclusive Kids grow. Most brands move on. We planned for it.
Reward toward the next size up*
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.