Do you really need a special detergent for workout clothes?

We tested five of the best-selling products to find out.

Our editors review and recommend products to help you buy the stuff you need. If you make a purchase by clicking one of our links, we may earn a small share of the revenue. Our picks and opinions are independent from any business incentives.

Browse online, and you'll find a dizzying array of laundry products. There are products that will promise to keep colors from running, clean your clothes without destroying the Earth, or even fold your laundry for you. However, the one category that struck me as the oddest were the detergents designed for your sportswear. Surely, the only thing different about these "sports detergents" were their marketing and packaging. Right?

The more I looked, the more different kinds I found. Some of these detergents have over six hundred five-star reviews on Amazon, so there had to be something to them, but what?

Then it dawned on me: I work in a laundry testing lab. So I got five of the top-selling brands, ranging from a generic brand to the sports detergent sold at Saks Fifth Avenue.

I designed a set of experiments to determine which sports detergents are worth your money. And I vowed not to stop until I got the answers I craved.

The Contenders

Win Detergent

Win
Credit: Reviewed.com / Jonathan Chan

Win was the only contender to have a blueing agent to help counteract yellowing. It costs around 25 cents per load.

Fels-Naptha

Fels Naptha
Credit: Reviewed.com / Jonathan Chan

Fels-Naptha is an additive used to boost the cleaning performance of regular detergent. It cost around 19 cents per load, plus the cost of detergent.

Sport Detergent

Sport Detergent
Credit: Reviewed.com / Jonathan Chan

Sold at Saks Fifth Avenue, Sport Detergent was by far the most expensive at 59 cents per load. However, it was also the most pleasant smelling.

Hex

Hex
Credit: Reviewed.com / Jonathan Chan

We found Hex to be the strangest. It has a dispenser nozzle, and focuses on killing bacteria. It costs 35 cents a load.

Sport-Wash

Sport Wash
Credit: Reviewed.com / Jonathan Chan

Sports Wash was the most economical, costing around 20 cents a load.

The Experiment

For consistency's sake, I decided to create fake sweat, rather than ask family and co-workers for their sweaty workout clothes. A quick gander around the Internet, and the general consensus is that sweat is about 98 percent water, 1 percent sodium, with trace amounts of magnesium, calcium, and urea. Based on that formula I ended up using 11 pounds of water, with 50 grams of salt, and 2 grams of Magnesium. For color, odor and a dirt analog, I also stirred in 10 grams of coffee grounds. I also chose coffee because it has a similar pH to urea, the chemical that causes sweat to stain yellow. Obviously, this isn't the perfect representation of real sweat, but it's pretty close. The end result looked like this:

"Sweat"
Credit: Reviewed.com / Jonathan Chan
The "sweat" consisted of.2 percent coffee, 1 percent salt, and.1 percent magnesium.

I soaked t-shirts in the "sweat" for four hours each.

Soak
Credit: Reviewed.com / Jonathan Chan
Each t-shirt was soaked in the sweat bath for four hours.

When they dried they looked pretty gnarly.

Comparison
Credit: Reviewed.com / Jonathan Chan
Compared to what they looked like out of the package, the t-shirts looked pretty gnarly after the four-hour soak

The t-shirts would give me some clue about how well each detergent worked based on how much I could still see the stain or smell the coffee. However, I needed something more scientific, so I also used the same stain strips we use for washing machine testing. Each strip runs the gamut of common household stains, including red wine and oil. After a wash, we used a photospectrometer (a color reader) to measure how much of each stain has been removed.

Stain strips
Credit: Reviewed.com / Jonathan Chan
To get objective results, I used a photospectrometer to determine how well each detergent removed stains.

To keep it quick and realistic, I tossed each t-shirt and stain strip, with the recommended amount of detergent, into the Samsung FlexWash's quick cycle set to cold.

The Results

So what did we learn from all this washing? Well, sports detergents are better at removing odors than they are at general stain removal. For day-to-day cleaning, you're going to want to stick to a more mainstream detergent.

Does that mean these sport-specific detergents are a waste of money? No, but only if you have sensitive skin. Of all the sports detergents I tested, Hex and Sport Detergent have this angle covered the best.

Sniff test
Credit: Reviewed.com / Kyle Hamilton
I smelled all the washed laundry. Hex and Sport Detergent had the best scents.

Both Hex and Sport Detergent are made from plant-based, non-toxic ingredients. Since neither contain dyes or SLS, they're way less likely to irritate sensitive skin. Even if you aren't normally allergic to regular detergent, the combination of sweat and movement means you're more likely to have a reaction in your workout clothes.

Between the two winners, I'd recommend Hex and Sport Detergent to two very different consumers. Hex left our testing t-shirt with a neutral smell. If you're just getting it for sportswear, it costs around 16 cents a load–more affordable than most detergents.

Sport Detergent is sort of the opposite. Costing about 59 cents a load, it is by far one of the most expensive detergent I've ever tested. It has a very complex scent made up of oranges, roses, eucalyptus, and jasmine. However, its shampoo-like bottle means it can easily travel with you. It is safe for hand washing, so instead of paying for a hotel laundry service, in the sink your socks go, which might end up saving you money.

Our editors review and recommend products to help you buy the stuff you need. If you make a purchase by clicking one of our links, we may earn a small share of the revenue. Our picks and opinions are independent from any business incentives.

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Our editors review and recommend products to help you buy the stuff you need. If you make a purchase by clicking one of our links, we may earn a small share of the revenue. Our picks and opinions are independent from any business incentives.
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