Oakley Flak 2.0 XL Review

Updated: March 24, 2023

Oakley has always been a favourite sunglasses brand for hikers, runners and other active, outdoor enthusiasts, and their Flak 2.0 XL sunglasses really hit the mark.

They're lightweight, stylish, comfortable and provide excellent protection for your eyes. The XL frame adds enhanced lens coverage onto a standard frame so that the peripheral vision is improved with High-Definition Optics.

The Oakley Flak 2.0 XL are the best overall hiking sunglasses. They are the perfect pick for anyone looking for some protective and durable sunglasses to protect their eyes during outdoor activities. 

While their lenses are quite big, they have been designed to suit all face sizes so that anyone can wear them comfortably.

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Oakley Flak 2.0 XL

Manufacturer: Oakley


  • Comfortable, snug fit
  • Excellent clarity
  • Stylish design
  • Many colour options and interchangeable lenses
  • Lightweight and sturdy build


  • Large lenses
  • No ventilation system


The Oakley Flak 2.0 XL are essentially the upgraded version of the popular Oakley Flak Jacket XLJ with improved styling and enhanced lenses.

They have a lightweight yet sturdy build, that fits snugly around the face so that they stay put during more rigorous activities. 

The frames feature rubbery grips at the nose and ears to ensure that they won't get dislodged or fall off the face when hiking, running, cycling etc.

The lightweight design of the Oakley Flak 2.0 XL, combined with its 3-point fit and rubbery grips, ensure that the sunglasses will stay put throughout the day cause no discomfort.

While the XL version is designed to fit people with medium to larger faces more comfortably. However, you can choose to get the standard Oakley Flak 2.0 if you have a smaller to medium face.

The Oakley Flak 2.0 XL have a semi-rimless frame design so that there is as little obstruction to your view as possible. This is a great design if you are looking for hiking sunglasses as you can easily look down at the trail as you trek without any rims getting in the way. 

The lenses of the Oakley Flak 2.0 XL are interchangeable so that you can collect a few styles and change them out, depending on what activity you're doing and what lenses would be more suitable it.

Oakley offers many lens options, including Prizm, polarized, photochromic, HD polarized and standard, so that you can choose whichever style and lens technology you prefer.

Their polarized lenses offer more protection from glare, while their Prizm lenses optimize colour and contrast. Made from high quality Plutonite, all Oakley lenses are designed to offer maximum protection for your eyes.

Some of their styles come with an Iridium finish to help cut out even more glare. The Oakley Flak 2.0 XL comes with an electrostatic Microclear bag and case to protect the sunglasses and prolong their use.

These sunglasses are an excellent choice if you're looking for a durable pair of sunglasses! They'll stay on your face and provide complete protection from the sun while you go hiking, running, cycling or participate in any other outdoor activity.

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See Other Hiking Sunglasses

Finding the correct hiking sunglasses for your needs and budget remains a tricky task and sifting through the troves of reviews can be time consuming and confusing. To make things easier, check out our expert review on the top hiking sunglasses here.

Key Features 


The Oakley Flak 2.0 XL sunglasses frames are made from O Matter material, which is both durable and lightweight.

O Matter is a pliable plastic that allows the frames to fit more comfortably around various face sizes while being snug enough that the sunglasses will not be dislodged or fall off easily.

O Matter frames tend to fit people better and create a seal around the face and eyes to provide optimal protection from the sun and the elements. 

The Oakley Flak 2.0 XL sunglasses have a three-point structural design that keeps the sunglasses optically aligned and fits the shape of the face better.

The frames also feature rubbery grips around the nose and ears to prevent the sunglasses from slipping, moving around the face too much and falling off. 


Oakley offers a range of different lens options so you can choose which type you think will suit your needs the best.

The lenses are also interchangeable so you can collect a number of different ones to suit different activities, or easily replace a damaged/scratched pair with some new ones without having to buy a whole new pair of sunglasses.

The lens options are HD Polarized, Iridium coatings, Prizm technology and photochromic. HD Polarized lenses help to filter out 99% of glare without any optical distortion that may occur with standard polarized lenses.

Oakley's Iridium coating on lenses allows your vision to adjust easily to any light conditions without any strain. Prizm lenses control light transmissions so that colours become more enhanced and contrasted to improve visibility.

The photochromic lenses darken automatically to adapt to light changes while filtering out 100% of all UV light.


While all of the Oakley Flak 2.0 XL sunglasses' lens options provide full protection from harmful UV light, polarized lenses are better for cutting out reflected glare and reducing any strain on the eyes.

You can choose whichever lenses you prefer as the Oakley Flak 2.0 XL comes in many styles with different lens options, including various polarized lenses.

Polarized lenses are generally more expensive than standard lenses, however, they are definitely recommended for hikers and outdoor enthusiasts. They will ensure your eyes are fully protected and comfortable as you spend plenty of time outside. 

About the author 

Mark Whitman

Mark has trekked extensively in Asia, Europe, South America and Africa. He founded Mountain IQ in 2014 with the sole aim to be the best online information portal to some of the most popular mountain destinations around the world. When not writing for Mountain IQ, Mark is out exploring the outdoors with his wife!

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