Just Dropped: Frost.
Cold start. Hot finish.

A new evolution of Hi—Tech Body Architecture.

Ultra Complex® builds systems where muscles meet fabric and movement becomes identity. Engineered for every rep, pose, and night.

Now introducing: Energy Shorts®. Professional training gear engineered for support, utility, and control.
Candy
Candy
Phantom
Phantom
Frost
Frost
Combat
Combat
Bruise
Bruise

“Phone, keys, cards — everything stays locked with zero bounce. I forget I’m carrying anything at all.”

Shop All Pro—level* →
Shop All Pro—level* →

Designed for Water, Sun and Sweat

Bodies are complex. So are we.
Our design fuses sport logic with graphic language—silhouettes carved from muscle, sweat, and speed. Ultra is not just what you wear. It’s how you perform.

A man wears black underwear with white text on the front, standing with arms relaxed at sides, against a white background.
Alpha Sunga
Alpha Sunga
Close-up of a man's lower torso and upper legs wearing green underwear with branding.
Muscle Tanga
Muscle Tanga
A shirtless man with tattoos, wearing navy blue underwear with white accents, and a silver necklace with a spherical pendant.
Straight Bottom
Straight Bottom
Shop All Swimwear →
Shop All Swimwear →

Reviews

  • Black and white photo of a man standing on a boat fishing in a lake surrounded by tall trees.

    Nothing beats the feeling if training with these shorts. Flexibility, freedom, awesome quality!

    Angel Mario M

  • A black and white photo of a classical cityscape featuring a tall building with a square top, a clock tower, and a domed church in the foreground.

    So happy with how these shorts fit, and look! Everyone around me is constantly asking where I got them and I have never been more happy to share. Will be buying more soon!

    Brenden R

  • A text image with the phrase 'Ready to go' in black on a white background.

    They look small when you open the package but they fit like a glove! Compressed in all the right places and feel nice. Can’t wait to get more colors.

    Wesly M

  • A close-up of a plant with green leaves in a pot, taken indoors with a blurred background.

    Beautiful fit! This brand is dedicated to making sure people of all sizes can enjoy their skin shorts. I'm already thinking about my next order. Shipping to Canada went smoothly.

    Max M

Engineered Compression

Second-skin stretch. Sweat-Smarter™ tech. 11 charged colorways — made to train, made to play, made to be seen.

Close-up of a man wearing striped green and black compression shorts with the word "ultra" on the left leg, standing with his back slightly turned.
Butter
Butter
A man wearing green and black striped boxer briefs.
Sweat
Sweat
Person wearing optical illusion patterned boxer briefs with vertical stripes, standing with hands on hips.
Haze
Haze
Back view of a shirtless man wearing gray and black striped boxer briefs, holding a light-colored bag.
Force
Force
Close-up of a man wearing black athletic compression shorts with white stitching and brand logo, with his hand on his lower back.
Core
Core
Track
Track
Back view of a man wearing blue and gray striped compression shorts
Close-up of a man wearing purple and black CSM branded athletic compression shorts, showing the side and back view.
Eclipse
Eclipse
Sky
Sky
Close-up of a man's lower back and legs wearing pink and gray striped athletic shorts.
Close-up of a person’s lower back and right leg, wearing tight, orange and black patterned athletic shorts with white accents, designed for sports or workout activities.
Solar
Solar
Shock
Shock

“They stay locked. No drift, no sagging. Best shorts I've trained in.”

Shop All Shorts →
Shop All Shorts →