Technology & Features

Performance
Premium performance headwear born from running so you feel lighter, freer, and ready to move. Stay comfortable in any condition and keep your momentum strong.

Quality
Durability you can count on. No sagging or fading, just headwear that keeps you confident and focused on feeling your best every day.

Endurance
Built to elevate your performance and your day the moment it goes on. Light, sharp comfort that lifts every movement and motivates you to keep going.

Style
Clean, versatile headwear that helps you feel good wherever you go. Look sharp on the run, feel confident through the day, and live your alter ego.
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Size Guide
| Size | Hat Size | Inches | CM |
|---|---|---|---|
| Small (S) | 6 ½ - 7 ⅛ | 20.5" - 22.4" | 52cm - 57cm |
| Most Popular STANDARD (Std.) |
6 ⅞ - 7 ½ | 21.7" - 23.6" | 55cm - 60cm |
| X-LARGE (XL) | 7 ⅛ - 7 ⅞ | 22.4" - 24.8" | 57cm - 63cm |
How to measure
To choose the right size, follow the steps below:
Use a measuring tape for maximum accuracy (flexible tape, if possible).
Make sure the measuring tape is positioned to where your hat will be wore and neither too tight nor loose.
Measure on bare skin / over hair similiar to how you would wear your hat.
Compare your head measurements to those on our size chart, and choose the size closest to yours.
Size Guide
| Size | chest | waist | ||
|---|---|---|---|---|
| XS (0-2) | 31-34" | 79-86 cm | 25-27" | 64-69 cm |
| S (4-6) | 34-37" | 86-94 cm | 28-30" | 71-76 cm |
| M (8-10) | 38-41" | 97-104 cm | 31-33" | 79-84 cm |
| L (12-14) | 42-45" | 107-114 cm | 34-36" | 86-91 cm |
| XL (16-18) | 46-49" | 117-124 cm | 37-39" | 94-99 cm |
| XXL (20-22) | 50-53" | 127-135 cm | 40-42" | 102-107 cm |
How to measure
To choose the right size, follow the steps below:
Use a measuring tape for maximum accuracy (flexible tape, if possible).
Measure your chest
Wrap the measuring tape around the fullest part of your chest, just under the arms and across the shoulder blades. Keep it horizontal and snug, but not tight.
Measure your waist
Find the narrowest part of your torso, just above the belly button. Wrap the tape around your waist comfortably, leaving space for one finger.
Compare your chest and waist measurements to those on our size chart, and select the size that most closely matches your measurements for the best fit.
Size Guide
| Size | hips | waist | ||
|---|---|---|---|---|
| XS (0-2) | 34-36" | 86-91 cm | 24-26" | 24-26" |
| S (4-6) | 36-38" | 91-97 cm | 28-30" | 71-76 cm |
| M (8-10) | 38-40" | 97-102 cm | 30-32" | 76-81 cm |
| L (12-14) | 40-42" | 102-107 cm | 34-36" | 86-91 cm |
| XL (16-18) | 42-44" | 107-112 cm | 38-40" | 97-102 cm |
| XXL (20-22) | 44-46" | 112-117 cm | 40-42" | 102-107 cm |
How to measure
To choose the right size, follow the steps below:
Use a measuring tape for maximum accuracy (flexible tape, if possible).
Measure your hips
Stand with your feet together and wrap the tape around the fullest part of your hips, keeping it level and snug but not tight.
Measure your waist
Measure your waist at the narrowest part, usually just above the belly button. Wrap the tape snugly around your waist, leaving a finger's width for comfort.
Compare your hips and waist measurements to those on our size chart, and select the size that most closely matches your measurements for the best fit.
These are really nice quality. Liner is comfortable. Rear pocket fits my phone well with little bounce. Wouldn’t mind an additional side pocket or two for more storage, but these are great for shorter runs or runs where you don’t need to carry more than the phone and car key.
Took these for the first time on a 13 mile tempo run and they worked great! I didn’t have any chafing and the pockets worked great for a key and some gels
As someone who has been running since 2014, I’ve tried a lot of different running shorts in that time. For me, fit has always been a struggle since I’m shorter with slightly larger quads / thighs.
I decided to give these a try and ordered a pair a couple of weeks ago, and I was honestly impressed. The fit around the waist is snug but not too tight or too loose. The storage pocket on the back fits my iPhone 16 Pro Max, and the material they’re using has give so as my leg strides forward and up while running, I don’t get that annoying pull or tightness across the top of my leg like some companies shorts do.
I literally ordered two more pairs the other day, another black and the royal blue! Highly recommend these. If you’re someone who is 5’8’ with a waist size of 29-31, I would go with the Small size in these 👌🏻
Please keep making these AlterEgo!
Amazing shorts, super light weight. Only thing is they run a little big in my personal opinion but still fit extremely well