Under Armour Sideline Pro Cooler Honest Review: Pros and Gripes

I bought the Under Armour Sideline Pro cooler two seasons ago for one reason. I got tired of carrying a plastic sack of ice and a loose six pack up the concrete steps at Bristol while my left knee complained the entire way. Since then it has been to the spring Bristol race twice and the fall Talladega race twice, and it has ridden in the bed of my Silverado on plenty of Saturdays that had nothing to do with racing. This is not a victory lap for a brand. It is the review I wish somebody had handed me in the parking lot before I started hauling things up those steps.

The short version: it does the job, it has held up, and there are three or four things about it that still annoy me after two years. If you want the whole picture, keep reading. If you only want the complaints, drop down to the gripe list and know that I still load it every single trip.

What Nobody Tells You Before You Buy It

The first thing nobody mentions is size. The listing calls it a 12 can cooler and that is exactly what it is. Twelve standard cans plus ice fills it to the point where you start making choices about what else comes along. Linda and I split it. Four drinks each, a couple of waters, and a bag of ice on top. That is a race day for us. If you are picturing a cooler that also swallows lunch, a poncho, and a spare layer, you are picturing a different cooler. It measures 13.5 inches wide, 11.5 inches tall, and 8 inches deep, so picture a shoebox that got ambitious.

The second thing is that it is soft. That sounds obvious until you set it down on uneven ground and notice it does not sit the way a rigid box sits. In the grandstands that does not matter, because I hang it from the rail in front of me using the built-in fence hooks and it stays exactly where I put it. In the truck bed it matters a little. If the bed is empty and I take the turn out of the lot faster than I should, it goes over. I learned to wedge it against the wheel well. Small thing, but nobody tells you.

The third thing is the one I actually care about. This cooler is not going to keep ice frozen from Friday night to Sunday afternoon. It is a day cooler. The insulated lid and the coated outer fabric hold cold well for a race, but if you are tailgating from morning until the checkered flag on a hot afternoon, start with a block of ice or accept that you will be drinking cold water out of a wet bag by the last fifty laps. That is not a knock on the bag. It is what a soft cooler does, and the product page is not going to spell it out for you.

The Parts That Earn Their Keep

The fence hooks are the reason I stopped setting my drink on the concrete. Two hooks, molded into the back, and they drop over a rail in about a second. At Bristol the rail in front of the aluminum benches sits at the right height and the cooler hangs there with the lid facing me. I reach down, open the lid, take out a drink, and close it without standing up. With a bad left knee, not standing up is the whole game. Linda has hers on the other side of her seat and we both spend the afternoon reaching down instead of climbing over people.

The lid is quick to get into, which matters more than it sounds like it would. I can flip it open one handed while I have a cup in the other hand and a scanner in my lap. The liner inside is rigid enough that it does not fold in on itself while I am digging for the last can at the bottom, and that liner wipes out clean. I have dumped the melt water in the parking lot, wiped the inside with a paper towel, and had it dry by the time I got home. Two seasons of that and the inside still does not smell like a cooler, which is more than I can say for the hard box sitting in my garage.

The two exterior zip pockets are where the small stuff lives. Phone, sunscreen, a couple of napkins, and my handheld scanner if I have not put the headset on yet. They are not big enough to hold a sandwich and a rain poncho at the same time, so I pick one and leave the other in the truck. The outer fabric has taken dirt, spilled soda, and one memorable splash of somebody else's beer and still cleans up with a wet rag. The listing calls the material water resistant and that matches what I have seen. It is not waterproof. Set it down in a puddle and the bottom comes up damp.

It is a day cooler, not a weekend cooler. Once I stopped expecting it to be both, I stopped being irritated with it.

The Gripe List

There is no shoulder strap. This is my biggest complaint and it has not softened in two years. There is a haul handle, the handle is comfortable in the hand, and that is the end of the carry options. A loaded cooler with ice in it hanging off two fingers for the walk from the back of the lot to the gate is a genuinely long walk. I have done a half mile at Talladega with it. By the time I reach the gate I am switching hands every fifty yards and my forearm is talking to me. A strap would have made a real difference and I do not understand why it is not there.

The capacity is honest, but it is tight. Twelve cans is twelve cans. If you are bringing drinks for two people and ice to keep them cold, you are full. If a friend asks you to hold their water, you are over. I squeezed in a thirteenth can once by cutting back on ice and I paid for it later with warm drinks and a wet towel. If your group is bigger than two, this is not the cooler for the job, or you are the person carrying two coolers up the steps.

The lid does not seal the way a hard cooler seals. Cold air gets out. Ice melts faster than it would in a thick rotomolded box, and I have made my peace with that. On a ninety degree afternoon at Talladega the cubes were gone by the middle of the race. The drinks were still cold, but they were sitting in water, and reaching in for one meant a wet hand. I bring a small towel now and I drain the bag once around the halfway point. It is a routine, not a deal breaker.

One more note, and this is not really a gripe, just a fact you should have. The listing mentions a lifetime warranty and I have never had to use it, so I cannot tell you how that process actually goes. Nothing has failed. The handle is still attached, the hooks are still molded in tight, and both pockets still zip. I am telling you the warranty exists because it is printed on the label, not because I have tested it with a claim.

Two Seasons In: How It Has Held Up

I am hard on gear in a quiet way. I do not throw things, but I do leave a cooler hanging on a rail in the sun for six hours and then shove it into a truck bed. After two seasons and four race weekends plus a summer of Saturdays, the outside has some scuffs and one faint stain near the bottom corner. No tears. No separated seams. The zippers on the two exterior pockets still run smooth, and those are usually the first thing to give out on a bag like this.

The liner is the part I expected to fail and it has not. The rigid insert still sits flat in the bottom and the corners have not cracked from being folded or from me dropping it on the tailgate. I rinse it, wipe it, and leave the lid open in the garage overnight. That is the entire maintenance routine. It weighs about a pound empty, so when Linda hands it to me to carry out, it is nothing at all until the ice goes in.

The one thing that changed is how I pack it. Season one I filled it with loose cubes and paid for it with water everywhere. Season two I put a block in the bottom, cans on top, and a handful of cubes to fill the gaps. That single change bought me a couple of hours of real cold. If you buy this cooler, skip the learning curve and start with the block. It is the difference between cold drinks at lap 300 and a bag of cool water.

What I Would Change if I Were Designing It

A shoulder strap, first and always. Even a cheap webbing strap with a couple of clips would turn the walk in from a chore into nothing. Second, I would make the exterior pockets about an inch deeper so a sandwich and a folded poncho could ride together. Third, I would put a small drain at one corner so I am not tipping the whole bag over a storm drain in the speedway lot while trying not to lose a can in the process. None of these are big asks and none of them would change the price point much, as far as I can tell.

What I would not change is the size. It is the right size for two people walking into a grandstand, and every one of those changes I just listed would make it heavier or bulkier if somebody got carried away. The bag works because it is small enough to hang on a rail and light enough to carry empty. I would rather live with a missing strap than haul around a cooler that grew into something I do not need.

What It Will Not Do

It will not replace a hard cooler for a full weekend. If you are at the track from Friday practice through Sunday and you want ice on day three, this is not the bag for that job. It will not keep food cold and safe through a long day in the sun either, not the way a rigid box with a gasket will. And it will not meet every track's cooler rules. That part is on you. Every track posts its own policy on cooler size and what you can bring through the gate, and those policies change. I look up the current posted policy for Bristol and for Talladega before every trip, and I would look up yours before you load anything.

It also will not fix your back or your knee. I want to be straight about that, because a cooler review can start sounding like it solved something bigger than it did. What made race day bearable for me was the folding stadium seat with the back support that Linda and I bought before the Bristol spring race two seasons ago. The Under Armour cooler just took one small chore out of the day. That is all it did, and for what it is, that is enough.

Who This Is For

This is for the fan who drives to one or two races a year, sits in the grandstands rather than a suite, and wants cold drinks without hauling a heavy box up the steps. It is for somebody who walks in with a seat cushion in one hand and would rather the cooler hang on the rail than sit between their feet for four hours. It fits two people for a race day. If you already carry a scanner and a headset, the pockets will hold the small stuff and the bag will ride along without complaining. Under Armour made a day bag here, and for a day at the track it is the right shape.

Who Should Skip It

Skip it if you camp at the track, if your group is larger than two, or if you want ice that survives an entire weekend. Skip it if the walk in is long and you already know a strap matters to you, because this one does not have one and liking everything else about the bag will not fix that on the third trip. And skip it if you want a cooler that doubles as a seat. This is a bag, not a bench, and sitting on it is a good way to finish the afternoon with a wet pair of jeans and a bent liner.