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 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 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.
The Alter Ego Running Hat Sale is live with limited-time markdowns on select performance hats and accessories.
Save on premium running hats built for durability, comfort, and all-conditi...
The Alter Ego Running Hat Sale is live with limited-time markdowns on select performance hats and accessories.
Save on premium running hats built for durability, comfort, and all-conditions performance. Inventory is limited, and popular fits will sell through quickly. Shop the sale while pricing lasts.
What You’ll Find
This sale features a rotating selection of Alter Ego favorites and best-sellers:
Markdowns on performance running hats and accessories
Select fits and colorways at reduced pricing
Subscriber-only perks and early access opportunities
Limited quantities across sale styles
Once a style is gone, it may not return.
Featured Fits
Explore Alter Ego’s performance fits, each designed for specific running styles and preferences:
Drifter Fit – Higher crown and bold profile for runners who like a standout silhouette with a lightweight, breathable feel. Ideal for casual wear or fast-paced runs.
Cruiser Fit – Balanced comfort and airflow for everyday training and long sessions. Features ultra-lightweight construction and quick-drying breathability.
Trotter Fit – Built for endurance with extended wear in mind. Engineered for long miles, this fit handles sweat, movement, and changing conditions.
Traveler Fit – Durable and versatile for outdoor adventures, whether you’re running, hiking, or exploring. Resistant to water and weather thanks to AER Splash™ Technology.
All hats feature AER Splash™ Water Repellent Technology, HyperPoly+™ Fabric, and lightweight construction for reliable performance, no matter the conditions.
How to Access the Best Pricing
Join the Alter Ego email or text list for exclusive offers and early access
Follow Alter Ego Running for sale updates and limited drops
Shop early - quantities are limited, and popular fits go fast
Why Alter Ego
Alter Ego designs performance running hats to handle real miles. Key features include:
Breathable, moisture-managing fabrics
Water-repellent protection for changing conditions
Lightweight construction without sacrificing durability
Adjustable fits for comfort and security
Trusted by runners who expect performance without compromise.
Frequently Asked Questions
Sign up for email or text updates to receive early access and exclusive offers.
Yes. Insulated options and beanies are available alongside lightweight hats for all-season performance.
Yes. All Alter Ego hats are built with performance materials designed for active use.
Yes. Materials and construction are selected to maintain fit and performance over time.
Yes. Adjustable designs and multiple fits provide comfort for all.
Introducing the trotter fit, our modern interpretation of a classic hat that is sure to impress.
Shop the look
Elevate your running game with the cruiser fit - a premium, unstructured running hat that looks and feels fast, while The drifter fit was designed with modern style in mind, featuring a horizontal shape and flat brim that offer a sleek and contemporary look.