REASONS TO BUY
Good water and wind resistance
Lots of features
REASONS TO AVOID
Heavy
Poor breathability
Brooks Infiniti Jacket Review
Brooks Infiniti IV
Credit: Brooks
RELATED: Best Running Jacket of 2024
Our Verdict
The Brooks Infiniti IV comes fully loaded with features designed to keep you satisfied. If you're someone who is easily distracted by bells and whistles, don't fear! We've tested this running jacket extensively and we're ready to give you the lowdown. The Infiniti IV holds up against the rain like a champ, and brisk winds are stopped in their tracks. To our dismay, however, when it comes to breathability this piece needs work. No matter how water resistant the outside is, when your sweat condenses on the inside of this running jacket you're going to be soaked. The Infiniti IV is also the heaviest model we tested. If you're looking for a more breathable layer check out our Editors' Choice Winner, the Arc'teryx Incendo, or our Top Pick, the Marmot DriClime Windshirt. On the other hand, if you need a lighter weight piece, check out the Montane Featherlite 7.
Our Analysis and Test Results
Taking the Brooks Infiniti IV out on a trail run. Unfortunately, this piece did not score as very high in our most important metric: breathability.
Credit: Jared Dean
The Brooks Infiniti IV is loaded with all the bells and whistles any runner could ever want. It is an effective barrier against rain and wind, but is lacking in breathability. Additionally, it's the heaviest running jacket that we tested.
Performance Comparison
Breathability
The Brooks Infiniti IV is constructed primarily of polyester. There are no mesh panels, or vents of any kind incorporated into its design. Within two miles of a five mile run we consistently wished that it had some ventilation. Our body temperature didn't feel regulated, and we just felt like we were overheating. The Infiniti IV easily collected moisture from sweat, and condensation formed on the inside, making us feel drenched. In colder temperatures, the sweat didn't condense as much, but we were still unhappy with the amount of moisture that formed.
The lack of ventilating panels on the Infiniti IV makes the sun feel like your worst enemy. The jacket's inability to breathe causes moisture to build inside the jacket.
Credit: Jared Dean
Wind Resistance
We found that this piece held up really well against the wind. Indeed, the solid polyester construction was unforgiving in blustery weather. Additionally, the drawstrings around the waist helped keep any stray gusts from finding their way into the jacket, as did the elastic cuffs around the wrists. The drawstring on the Brooks Infiniti IV didn't ride up either, unlike some of its competitors, such as the Sugoi HydroLite. For a piece that compares in wind resistance, check out the Marmot DriClime Windshirt.
There's enough reflectivity and bright colors on the Brooks Infiniti IV to keep you safe on the road. Reflective material is added on the seams across the top breast of the jacket, lines both sides of the zipper.
Credit: Jared Dean
Features
The Brooks Infiniti IV comes loaded with bells and whistles. The first thing that stood out to us was the ample storage space. There are two side pockets, as well as two open interior pockets (they don't zip closed and unfortunately aren't deep enough to keep items in place while running). There is also a nifty waterproof media pocket on the inside where your electronic device is sheltered from the elements and the unfortunate amount of condensation you may experience while wearing this piece. On the inside front of the Infiniti IV, at collar bone height there is an elastic loop for headphone cords to be threaded through. This feature stopped our headphones from tugging out of our ears as we ran — bonus! This piece also has reflective material lining the seams on the shoulder, which is a great safety feature. The only other jacket that compared in features to the Infiniti IV was our Best Buy Award winner, the Saucony Sonic.
The nifty weather resistant media pocket is large enough to fit your phone or MP3 player, and keep it safe from the elements, whether it's from the rain or your own sweat.
Credit: Jared Dean
Water Resistance
When we ran in the rain, we found that the Brooks Infiniti IV repelled water fantastically. Overall, we thought this piece's water resistance was its best attribute. Brooks uses a DWR finish on the polyester shell as a water repellent. In light and heavy rain, water rolled right off, and since there are no vents or mesh panels, it's difficult for water to get in.
The Infiniti IV repelling water well using a DWR finish. In light to heavy rain, water beads and rolls right off the fabric.
Credit: Jared Dean
Weight
The Brooks Infiniti IV weighs in at 10.75 ounces, making it the heaviest running jacket we tested. Part of the reason it's so heavy is because of all the added material for pockets. We feel that on a short run, the heavy weight is hardly noticeable, but we don't recommend it for long distance running. If you need an ultra-lightweight layer, check out the Arc'Teryx Incendo or Montane Featherlite.
Testing the Infiniti IV on some trails. This was one of the heaviest jackets we tested.
Credit: Jared Dean
Fit
Our testers thought that Infiniti IV fit pretty well. The sleeve length is fine, and the torso reaches to just below the top of the hips. The polyester construction stretches as well, making any possible restriction of movement disappear.
The Brooks Infiniti IV is a slim and tight fitting running jacket. The fabric stretches enough for any motion your body will execute on a normal run.
Credit: Jared Dean
Best Applications
We don't think that the Infiniti IV would be suitable for anything but stepping out your door for a quick run. We think it's too heavy for long distance running, or long trail runs. It's a good piece to wear if you were taking your dog for a walk, or doing some power walking. It does perform a little better in cold temperatures than some of the other pieces we tested, but in warmer conditions it becomes over heated quickly and breathes poorly.
Testing the Infiniti IV in winter conditions was a little rough because of the lack of an insulating liner.
Credit: Jared Dean
Value
At a $120 we can't say that we would be excited to purchase the Infiniti IV, especially considering how heavy it is and how poorly it faired with breathability. However, it does have a lot of storage space, which makes it ideal if you're the type of runner who carries loads of gear and gadgets with them when they run.
There's a loop on the Infiniti IV to hold your headphone cords in place while you run, which stops any tugging on your headphones that would normally pull them out of your ears.
Credit: Jared Dean
Conclusion
The Brooks Infiniti IV has a variety of fun features like its media pouch, and it performed well in our water and wind resistance tests. Overall, it's a great running jacket for the runner who needs a layer to throw on when they step out their door for a brief jog. Its main drawbacks are its weight and its poor performance in breathability.
The Brooks Infiniti IV working hard on a trail run.
Credit: Jared Dean
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Jared Dean
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