Under Armour Define Sunglasses

Under Armour Define Sunglasses

Gear up the next generation of athletes with eyewear built to perform. Designed specifically for pre-teens (ages 11–15), the Under Armour Define Sunglasses combine lightweight durability with professional-grade eye protection, making them the ultimate choice for baseball, outdoor sports, and everyday wear.

Key Features:

• Built for Action: Features a durable, lightweight TR90 polyamide-injected plastic frame with an athletic, rimless design for an unobstructed field of view.

• Stay-Put Fit: Fully adjustable UA ArmourGrip nose pads and no-slip rubber temple tips keep the glasses securely on your face, no matter how intense the game gets.

• Maximum Protection: 100% defense against harmful UVA, UVB, and UVC rays to keep young eyes safe under the sun.

• Smart Design: Auto-lock stop hinges provide stability, and a soft microfiber pouch is included for easy cleaning and storage.

• Warranty: Protected for 3 years against manufacturer defects.

Eyesize: A: 99mm B: 51mm DBL: 1mm (See "More Help" tab for sizing information)

Sizing Information:

If you look at the description on most product descriptions, we have the "eyesize" measurements. Glasses are not measured in sizes like clothes or shoes. Frames can fit differently on each person's nose or ears. The best option is to try for fit. But you can use the "eyesize" to give you an idea of size. You can double the "A" measurement, add the DBL (nose bridge) and get an approximation of width. However, if the glasses are wrap around, the "eyesize" will be bigger since it wraps around the sides. Thus, comparing the eyesize of your regular glasses doesn't always work. If you are unsure about size, you can also contact us for a recommendation. For more information on how eyesize works, check out our eyesize video.

What is a "PD"

PD (pupil distance) tells us how to center the "sweet spot" of the prescription right in front of your pupil for the best vision. If this is not on your prescription, you can contact wherever you made glasses (not necessarily your eye doctor) to get this information. Or see below on how to measure yourself.

What is "Add"

Add is your reading prescription power. If you wear bifocals or progressives, you will need this. If you don't wear bifocals or progressives (typically people over 40) then you can skip this.

Prescription Lens Options

Need help navigating all the lens types and lens options? See a full description of options, tints and coatings on our lens options page.

How long will it take?

No prescription or premade prescription options ship in 1-5 business days. Call, chat or email to check stock if you need it faster.

Prescription products take on average about 7 to 10 business days. Coatings can add an extra week. High prescriptions can take extra time as well. Some brands also take longer. See each product page for estimated timelines.

For shipping times, see our shipping page.

Return policy

See our return policy.