Under Armour Shadow 4.0 Cap Review

8.7 score
[Editors rating (8.7)] = (WalkJogRun) score (8.7)/10

Editor rating: 8.7 / 10
User's rating: based on 0 user ratings
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If you’re an outdoor enthusiast and you enjoy getting out in the sun for your daily jogs or other workouts, then the Under Armour Shadow 4.0 Cap might be a perfect addition to your gear. It is going to help keep the sun and sweat from your eyes and face, keeping you dry and allowing you to see unhindered. It is comfortable and lightweight, giving you a barely there feel that consumers can appreciate. There are two mesh vents, one on either side of the cap, that allow a decent amount of air to flow into the lid, keeping you cool and dry throughout the day. A vast majority of customers love this hat, and it comes highly recommended by many.

Editor's Pros & Cons

Reflective detailing

Affordable price tag

Customizable fit

Lightweight and breathable

Long-lasting durability


Handfull of color options

Sticker tag causes problems


There are so many activities that you can participate in while wearing the Under Armour Shadow 4.0 Cap. It is designed for those who lead an active lifestyle. It is excellent for your outdoor adventures, helping shield your eyes and face from the sun and keeping the sweat out of your face. It looks great and feels great, giving you a comfortable feeling while you are out and about.

Of course, you aren't limited to being active while you wear it. If you are going to be anywhere under the sun, you can use this great looking hat. Going to the park with your family, going on a vacation to an amusement park, hanging out a sports game, this will be a perfect addition to your wardrobe and give you an extra layer of protection from the sun.


When it comes to your running apparel, including your headwear, you are going to want to make sure that you are wearing something breathable and well ventilated. You are going to need that air flow into the hat to help keep you fresh, allowing the heat from your head to escape the cap, so you are not overheating while you are out and about.

The side panels feature mesh inserts that are going to allow for a decent amount of air to flow through it, so you are remaining fresh for the duration of your workout. Not only will the vents help keep you cool and prevent, but it is also going to be used as a way to allow the moisture to escape. The sweat-wicking material will let the sweat to bead up and roll off the cap, giving it the ability to evaporate quickly. Then the moisture can escape the lid through these vents, preventing you from being stuck in something damp all day long.

In addition to the excellent breathability, the cap also helps keep you dry in other ways, as well as keeping the sweat and moisture out of your eyes while you are out and about. This hat features a built-in HeatGear sweatband that will aid and wicking away your sweat to provide you a cool and dry experience when you are in the middle of your workout.


The Shadow 4.0 cap is made out of 88% polyester and 12% elastane to give it added durability. The polyester fibers are super strong and will not be prone to tears or rips without a lot of force. The elastane is going to help give the cap a little bit of a stretch and stellar flexibility. This type of material is common for most athletic gear, including caps like this one.

It doesn't soak up your sweat as cotton might so you won't be stuck running around all day in a soaking wet cap. In fact, this one offers moisture-wicking fabric your sweat will bead up and roll off the material, allowing it to evaporate quickly.

There are mesh inserts on the sides of the hat that will help allow air flow into them. These mesh pieces are also constructed out of polyester for added durability.


When you are heading out for your daily run or other workouts, you want to try to make sure that you are comfortable You are already going to be making yourself uncomfortable as you push yourself harder you don't want to worry about your clothing, adding to that discomfort. Thankfully for many customers, this cap is extremely comfortable, so you are not going to have to worry about discomfort coming from your headwear.

The soft polyester material feels great on your head. It has a four-way stretch construction that gives you a flexible feel, so it is going to fit you perfectly and move with you when you are on the go.

It is also going to help prevent some of your discomforts by helping you keep dry and cool. The vents on the side panel and the sweatband help keep the sweat off your face and will let air into the cap so you can stay relatively cool, even on warmer days.

The curved bill will help shield your eyes from the sunlight, so you don't experience the discomfort of being blinded by the suns rays. It is also going to help keep the harmful UV off of your face, giving you an extra barrier from the harm that can be caused by the harmful rays.

Overall, customers have please by the comfort level they receive from this cap.


The Under Amrour Shadow 4.0 hat is a one size fits all cap with an adjustable back strap. This is going to allow the lid to fit as many people as possible. The cap has a circumference of 22-23.5 inches, but again it has an adjustable strap, so it is going to be able to give you a snug and comfortable fit. You can take advantage of the unconstructed fit that will conform to your head to provide you with a lower profile and a super comfortable fit. Customers seem to be very pleased with the sizing of this hat and the way it fits their head.


The Under Armour Shadow 4.0 Cap is designed and constructed to keep up with those who enjoy leading an active lifestyle. It can stand up and handle quite the beating. The polyester fiber and moisture wicking coating are going to help ensure that the hat stays intact for quite a while. It isn't going to easily rip or tear, increasing the overall durability of the product. Additionally, even though there is a bit of a stretch to the hat, to give you a more comfortable fit, but also the elastane is constructed out of durable fibers. It will hold its shape and does not tend to stretch out over time.

Of course, you want to make sure that you are taking care of the lid properly if you're going to extend the lifespan to its full potential. You can wash it according to the directions on the tag to avoid shortening the longevity of the cap unintentionally.

The one problem that a lot of customers have with the cap is that it comes with a sticker on the front. It doesn't always come clean off, so some of the adhesives are left behind on the hat, ruining the look of it. It can cause the cap to become discolored where the sticker was and frustrates many customers.


The Under Armour Shadow 4.0 Cap has a pretty standard style, comparable to most baseball style hats on the market today. It has an adjustable back strap so you can customize the size for a more secure and comfortable fit. This cap also features vented panels on the side, in a contrasting color, to give you a more aesthetically pleasing look while still providing you with a breathable and well-ventilated product.

The unisex cap comes in a handful of color options so you can try to find one that will best suit your style. You can choose between artillery green, black, midnight navy, steel, or white. Every color comes with reflective detailing in the way of the UA logo on the front of the cap and the words Under Armour written on the back.

Customers seem to be content with the color options they have for the hat and enjoy the overall style of it.


This hat runs about average when it comes to running caps. It has impressive durability so you aren't going to have to worry about having to spend more money in the near future to replace it. It also comes with some great features like a customizable fit, a variety of color options, mesh inserts, HeatGear sweatband, and four-way stretch construction. All of these things combined make the Under Armour Shadow 4.0 Cap well worth the price tag. The vast majority of customers were pleased with their purchases.


There isn't very much information on what the exact weight of the Under Armour Shadow 4.0 Cap is; however, customers have stated that it is ultra lightweight and offers a barely-there feeling when they are wearing it. It's essential to keep your running apparel and gear as lightweight as possible as you are not going to want to be stuck running around all day with unnecessary weigh attached to you that might feel like it's dragging you down. Also, the lightweight materials make it much easier to provide you with a comfortable and breathable experience when you are out and about.


You are going to be able to get a decent amount of security when you head out wearing the Under Armour Shadow 4.0 Cap. It can give you the apparent sun protection that you would expect from a hat like this, but it can also provide you with so much more.

Starting with the sun protection, of course, the bill is going to protect your eyes from the sun, helping reduce the distraction of sun getting in your eyes, but the bill can do more for you than just that. It is going to help you block out the world around you so you can stay focused on the task ahead and stay free of unnecessary distractions.

The hat is going to also help shield your face from the harmful UV rays, giving you an extra layer of protection between your skin and the sun. You might still want to consider using sunblock when you head out on a summer day, but it is nice to that you can get that extra layer.

Thanks to the built-in HeatGear sweatband, you are also going to get a little extra protection from the distraction and inconvenience of sweat rolling down your face and into your eyes. The sweatband is going to soak up the sweat and give it a place to go, allowing it to evaporate and escape the cap so you can stay dry and distraction free. On that same note, the material will wick moistures easily and dries quickly as well, so you aren't stuck in a wet hat all day long.

One final form of protection this hat can offer is reflective detailing on the from and back of the cap. The UA logo on the front and the words Under Armour on the back are made using reflective materials to help ensure you are staying visible when heading out in low light conditions. It is essential that passers-by can see you when you are out for a run so you don't chance any preventable accidents because they couldn't see you. You might want to consider wearing other reflective clothing as well, but this cap is going to give you a little extra protection.


When you are wearing this hat out for your daily jogs or other workouts, chances are you are going to be sweating a lot. You are going to want to make sure that you are cleaning your hat, so it doesn't develop an odor over time. The good news is that this cap is machine washable so you can just pop in in the washer to get it clean and smelling fresh. You will want to ensure that you are cleaning it according to the directions on the tag, so you don't run the risk of speeding up the wear and tear process because you didn't take proper care of it.

Bottom Line

If you enjoy getting out under the sun to get your workouts in then, you might want to consider the use of a running hat such as the Under Armour Shadow 4.0 Cap. It is going to help keep the sun and sweat off of your face and out of your eyes, keeping you comfortable, and reducing unnecessary distractions. The built-in HeatGear sweatband wicks sweat away, and there are two mesh vents, one on each side, that work together to help keep you feeling cool and dry through the duration of your workout. If you are looking for a great hat to wear out on your adventures then you have come to the right place, customers love this cap and it many would recommend it to their friends and family.