How to Get Mud Out of a Heavy Hoodie

Mud season in Canada does not wait for spring. From the middle of September the trails go soft, the sidelines turn to soup, and the first properly wet week puts a brown stripe up the back of everything you own. On a heavy hoodie it looks worse than it is. Thick loopback holds a lot of water and a lot of grit, so a splash that would sit on the surface of a poplin shirt gets pushed down into the loops.

Mud is one of the more cooperative marks you can get on cotton. Most of the advice written about it is guesswork, though, and some of it is wrong about what mud even is.

What mud actually is

Mud is mostly mineral. Clay, silt and sand, plus whatever organic matter and road film came with the water. Textile researchers treat that as particulate soil, which behaves differently from the greasy marks that come off skin or off a chain.

You can see the distinction in the test work. In a 1982 study in the Textile Research Journal, M. A. Morris and H. H. Prato soiled cotton, polyester and cotton/polyester fabrics with clay and with synthetic sebum, then measured the clay by x-ray fluorescence analysis of iron and silicon while tracking the oily fraction separately with radiolabelling. Clay was quantified as mineral content. Not protein, not fat.

That matters because the consumer guidance does not always agree. Tide's own stain page states that "Mud is a protein-based stain and is best removed when washed on high temperatures", then tells you to scrape off the excess and wash at the highest temperature the care label allows. The temperature advice lines up with the research. Calling mud a protein stain does not line up with how clay is measured in a laboratory. Worth knowing before you buy an enzyme booster on the strength of it.

Why temperature helps, and what it costs

Morris and Prato reported that both clay and oily soil were best removed from cotton at higher wash temperatures, and also that wash temperatures as low as 10 °C gave acceptable soil removal levels. Both halves of that sentence are useful. Warmer water works better on clay. Cold water still works.

There is a price on the warm side. Colour loss from laundering is real enough to have its own standard test. AATCC TM61-2013e(2020)e2, Test Method for Colorfastness to Laundering: Accelerated, condenses roughly five home washes into one 45 minute laboratory run using controlled temperature, detergent, bleach and mechanical action. That method measures how a fabric holds colour under laundering. It says nothing about any particular garment. The practical read is that a hot wash of a dark cotton hoodie spends something, so spend it when you need to rather than by default.

One finding from that 1982 paper needs a footnote. Phosphate-built anionic detergents removed soil better than the other formulations tested, at any temperature. You cannot buy that result in Canada. Under the Concentration of Phosphorus in Certain Cleaning Products Regulations (SOR/89-501), phosphorus in any household laundry detergent must not exceed 1.1% by weight as phosphorus pentoxide, or 0.5% as elemental phosphorus. Old detergency papers read differently once you know what is no longer in the bottle.

Agitation is doing more of the work than you think

For particles held in a knit, the water has to physically carry them out. A 2015 study in the Textile Research Journal by Hye Ree Han, Seung Eun Chung, Jooyoun Kim and Chung Hee Park separated the mechanical contribution of the washer's agitation from the physicochemical contribution of the detergent. Washing efficiency generally rose with agitation speed and with detergent dose, and most conditions showed positive synergy when both acted together. The detergent's share was largest for oily soil, which comes off by rolling up. The mechanical share was higher when protein was in the soil.

Their soils were oil, protein and a mixture, so this is not a clay experiment and we will not pretend otherwise. What it does establish is that agitation is not a passive part of the cycle. If you stuff a 400 gsm hoodie into a full drum, soak it through and leave no room for movement, you have quietly removed the part of the process that shifts grit. Overloading is the most common reason mud survives a wash.

The walkthrough

Let it dry completely. Not twenty minutes. A heavy hoodie that has taken on water can sit for half a day indoors before the crust is properly brittle. Hang it somewhere with air moving past it.
Take it outside. Flex the panel between both hands so the crust cracks, then shake the solids off over grass or a bin, not a laundry floor.
Brush what is left with a soft brush, working along the surface rather than into it. An upholstery nozzle on a vacuum is better than a stiff brush on brushed fleece.
Check the places that hide grit: cuff and hem rib, the inside of the hood, the pocket bag, and the drawcord channel. Rib knit traps sand and will keep releasing it into later washes.
Work a little liquid detergent into the remaining shadow with your fingers, not a brush, and leave it ten or fifteen minutes.
Wash it on its own, or with one similar item, so the drum has room to move. Warmest temperature the label allows. If the label is silent, start at 30 °C with a full dose of detergent and escalate from there.
Inspect it dry, in daylight, before it goes anywhere near heat. Wet cotton always looks cleaner than it is.
If a shadow remains, wash it again. A second ordinary wash beats one aggressive one.

If the mud arrived with grease, from a bike chain or a car park, treat that half separately first. The method is in how to get an oil stain out of a hoodie.

What no standard covers

There are published test methods for how well fabrics release soil in home laundering. It is worth knowing what they use. AATCC TM130-2025, Test Method for Soil Release: Oily Stain Release Method, applies corn oil under a weight and rates the residual stain from 5 to 1 against a printed stain release replica. AATCC TM215-2023, Test Method for Soil Release: Household Soils, is designed to measure the ability of fabrics and garments to release typical household soils during home laundering.

Neither one is a mud test. We could not find a standard household method that rates a garment on clay release, which means nobody can honestly put a number on how well a hoodie sheds mud.

Two honest gaps. First, letting mud dry before you touch it is sound shop practice and it is what the detergent makers advise, but we found no published comparison of dry against wet removal on a knit. Treat it as sensible rather than proven. Second, the faint yellow-brown cast that sometimes stays after the grit is gone is usually iron in the clay. Morris and Prato noted that iron content varied with clay particle size, which is why they preferred silicon as their indicator. Shifting that iron shadow is a different job from shifting the mud, and the household advice for it is folklore rather than tested method. What is not in doubt is that chlorine bleach is the wrong tool on a dyed hoodie.

Living with it

A heavy hoodie is meant to get dirty. Mud comes out. What ruins the garment is heat applied too early and a drum packed too tight, and both are free to avoid. Our wash and care notes sit on the club page, and there is a separate piece on layering for a Canadian autumn if the weather is your next problem.

Sources

Morris, M. A. and Prato, H. H. "The Effect of Wash Temperature on Removal of Particulate and Oily Soil from Fabrics of Varying Fiber Content." Textile Research Journal, volume 52, issue 4, 1982, pages 280 to 286. journals.sagepub.com
Han, H. R., Chung, S. E., Kim, J. and Park, C. H. "Mechanical and physicochemical contribution in removal of different soil types on cotton fabric." Textile Research Journal, volume 85, issue 19, 2015, pages 2009 to 2019. journals.sagepub.com
AATCC. TM130-2025, Test Method for Soil Release: Oily Stain Release Method. American Association of Textile Chemists and Colorists, 2025. members.aatcc.org
AATCC. TM215-2023, Test Method for Soil Release: Household Soils. American Association of Textile Chemists and Colorists, 2023. members.aatcc.org
AATCC. TM61-2013e(2020)e2, Test Method for Colorfastness to Laundering: Accelerated. American Association of Textile Chemists and Colorists. members.aatcc.org
Government of Canada. Concentration of Phosphorus in Certain Cleaning Products Regulations, SOR/89-501, section 3. laws-lois.justice.gc.ca
Procter & Gamble (Tide). "How to Remove Mud Stains from Clothes." Manufacturer care guidance, accessed September 2026. tide.com