Size	Hat Size	Inches	CM
X-Small	6 ¼ - 6 ⅞	19.6" - 21.7"	50 - 55
Small	6 ½ - 7 ⅛	20.5" - 22.4"	52 - 57
Most Popular Standard	6 ⅞ - 7 ½	21.7" - 23.6"	55 - 60
X-Large	7 ⅛ - 7 ⅞	22.4" - 24.8"	57 - 63

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

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

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Products

Technical Tank Black

Name: Technical Tank Black
Brand: Alter Ego Running
SKU: TT100
Price: 39.0 USD
Availability: OutOfStock

$49

$39

Shipping calculated at checkout.

Out of Stock
Backordered, shipping soon

Color:

Technical Tank Black

$39 $49

Same-Day Processing - Est. Delivery: 2-5 Days

SKU: TT100

Free Shipping

Free ground shipping on U.S. orders over $75

Fast Shipping

All orders placed by 5:00pm ET ship the same-day  
(excluding Sundays and federal holidays). 

Free Returns & Exchanges

Free and easy returns and exchanges within 30 days

Technical Tank

Tested in motion and trusted in training.

Engineered for high-output training, the Technical Tank is lightweight, breathable, and optimized for airflow. Flat-lock seams eliminate chafing, and reflective elements ensure you're seen when visibility drops.

Advanced moisture control keeps you cool and dry
Flat-lock seams for irritation-free training
Reflective detailing for visibility at any hour
Streamlined cut for race-day mobility

Designed to move with you, not against you.

Water Repellent

Reflective Elements

Sweat Wicking

Hidden Pocket

Durable Fabric

Breathable Design

Lightweight

Custom Enclosure

No washing machines, no hassle. To clean your hat, rinse with water, shake it out or hang to dry, and you’re good to go.

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This Is Alter Ego

It’s not just how you train, it’s how you live. Active lives and real moments.

Built Better. Looks Better.

Performance

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

Size	Hat Size	Inches	CM
X-Small	6 ¼ - 6 ⅞	19.6" - 21.7"	50 - 55
Small	6 ½ - 7 ⅛	20.5" - 22.4"	52 - 57
Most Popular Standard	6 ⅞ - 7 ½	21.7" - 23.6"	55 - 60
X-Large	7 ⅛ - 7 ⅞	22.4" - 24.8"	57 - 63

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

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

Finding products you'll love...

Frequently Asked Questions

Most hats are adjustable and designed to fit a variety of head sizes. The adjustable closures ensure a secure fit for different head shapes and hair types.

It’s best to hand-wash your hat to preserve its shape and materials. Avoid using a washing machine to maintain its quality.

Absolutely. Whether you’re running, golfing, or simply cheering for your team, our hats are built with the best performance fabrics and adjustable fits that keep up with your most active days.

Yes. Every hat in the collection is designed to look great and perform well for everyone. With versatile styling and adjustable fits, these hats are truly unisex.

They do. All Alter Ego hats feature adjustable snapbacks for a custom fit, and we also offer Small and X-Large sizes with different circumferences and crown depths. This ensures comfort and performance no matter your head shape or size.

Hat Size Guide

How to Measure Your Hat Size

Use a measuring tape for maximum accuracy (flexible tape, if possible).

Measure where the hat will sit, with the tape snug but not too tight.

Measure on bare skin or over your hair, similar to how the hat is worn.

Match your measurement to the closest size on our chart.

Size Guide

How to measure

Use a measuring tape for maximum accuracy (flexible tape, if possible).

Measure your chest

Measure your waist

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

How to measure

Use a measuring tape for maximum accuracy (flexible tape, if possible).

Measure your hips

Measure your waist

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.

SEARCH PRODUCTS

QUICK SEARCH RESULTS

Technical Tank Black

Free Shipping

Fast Shipping

Free Returns & Exchanges

Technical Tank

This Is Alter Ego

Built Better. Looks Better.

Performance

Quality

Endurance

Style

Hat Size Guide

How to Measure Your Hat Size

Use a measuring tape for maximum accuracy (flexible tape, if possible).

Measure where the hat will sit, with the tape snug but not too tight.

Measure on bare skin or over your hair, similar to how the hat is worn.

Match your measurement to the closest size on our chart.

Size Guide

How to measure

Use a measuring tape for maximum accuracy (flexible tape, if possible).

Measure your chest

Measure your waist

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

How to measure

Use a measuring tape for maximum accuracy (flexible tape, if possible).

Measure your hips

Measure your waist

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.

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Frequently Asked Questions

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Shop the look

Shop the look

Shop the look

Shop the look

Use a measuring tape for maximum
accuracy (flexible tape, if possible).

Measure where the hat will sit, with
the tape snug but not too tight.

Measure on bare skin or over your
hair, similar to how the hat is worn.

Match your measurement to the
closest size on our chart.

Use a measuring tape for maximum
accuracy (flexible tape, if possible).

Measure where the hat will sit, with
the tape snug but not too tight.

Measure on bare skin or over your
hair, similar to how the hat is worn.

Match your measurement to the
closest size on our chart.