How to Wash Hiyo Sweatpants Without Shrinking Them

Quick answer

Wash your Hiyo sweatpants in cold water on a gentle cycle, inside out, with a mild detergent. Skip the dryer and air-dry them flat or hang them to prevent shrinking. Heat is the main cause of shrinkage in cotton-blend fleece, so cold washing and air drying are the two habits that protect the fit.

Hiyo sweatpants are made from soft cotton-blend fleece, and that same cozy fabric can shrink if you wash or dry them with heat. The fix is simple: treat them like a delicate, not like a towel.

This guide walks through the exact steps to wash sweatpants without shrinking, from sorting and turning them inside out to drying them flat. It also covers what to do when a pair has already tightened up, and which small care habits keep the fleece, stitching, and zippered pocket working for years.

Why Hiyo sweatpants shrink (and what actually causes it)

Shrinkage in cotton-blend fleece comes from three things: heat, agitation, and moisture. Hot water relaxes the cotton fibers, and the tumbling action of a dryer pulls them tighter, so the fabric contracts. Hiyo sweatpants use blends like 80% organic cotton / 20% recycled polyester fleece or 80% cotton / 20% combed cotton, and both contain enough cotton to react to heat.

The good news is that shrinkage is largely preventable. Cold water slows the fiber contraction, a gentle cycle reduces agitation, and air drying removes the heat entirely. If you normally wash everything on warm and dry on high, changing just those two settings for your sweatpants will make the biggest difference.

• Check the care tag on your specific pair before washing; it is the most reliable guide.
• New sweatpants are most vulnerable in the first few washes, so be extra careful early on.

What you need before you start

You do not need special equipment. A mild liquid detergent, cold water, and a drying rack or a flat surface are enough. Avoid powder detergents that may not dissolve fully in cold water, and skip fabric softener, which can coat the fleece and reduce its softness over time.

If your sweatpants have a zippered stash pocket, like the 'never wasted' sweatpants, close the zipper before washing. An open zipper can snag the fleece or scratch other items in the load. Turn the pants inside out to protect the outer surface from pilling.

• Use a mesh laundry bag if you are washing sweatpants with heavier items like jeans or towels.
• Measure the inseam and waist of a new pair before the first wash so you can track any change.

Step-by-step: washing Hiyo sweatpants

Start by turning the sweatpants inside out and closing any zippers. Sort them with similar lightweight items and avoid overloading the machine, because a crowded drum increases friction. Choose a cold water setting and a gentle or delicate cycle.

Add a small amount of mild detergent. Once the cycle finishes, remove the sweatpants promptly. Leaving them damp in the drum can set wrinkles and encourage odors. From there, move straight to air drying rather than the dryer.

• Wash similar colors together to avoid dye transfer, especially with darker fleece.
• If you must use a machine dryer, choose the lowest heat setting and remove the pants while slightly damp.

How to dry sweatpants without shrinking them

Air drying is the single most effective way to prevent sweatpants shrinking. Lay the pants flat on a drying rack or hang them from the waistband. Avoid hanging them by the cuffs, which can stretch the fabric downward while it dries.

Keep them out of direct sunlight and away from radiators or space heaters. If you are in a hurry, a fan on low can speed up drying without heat. Once dry, give them a quick shake and fold them rather than hanging them for long-term storage.

• Never put sweatpants in a hot dryer, even for a few minutes, if you want to preserve the fit.
• If the pants feel stiff after air drying, a short tumble on air-only (no heat) can soften them.

What to do if your sweatpants already shrank

If a pair has already tightened up, you can sometimes relax the fibers by soaking them in cool water with a small amount of hair conditioner for about 15 minutes. Gently stretch the fabric back to shape while damp, then lay flat to dry. This works best on mild shrinkage and may not fully restore a pair that went through a hot dryer.

Prevention is easier than reversal, so treat any recovered pair with cold washing and air drying going forward. If the fit is still too tight, consider whether the sweatpants are meant to be a relaxed or true-to-size fit before deciding to replace them.

• Do not use hot water or a hot iron to stretch shrunken fleece; heat will make it worse.
• Repeat the cool-soak method only once or twice, as over-stretching can distort the seams.

Everyday habits that keep Hiyo sweatpants in shape

Wash sweatpants only when they need it. Spot-clean small marks and air them out between wears to reduce how often they hit the machine. When you do wash them, keep the load light and the cycle short.

Store folded sweatpants in a drawer rather than hanging them, which can stretch the waistband over time. If you wear your sweatpants for lounging and light activity, these habits will keep the fleece soft and the fit consistent.

• Rotate between two pairs if you wear sweatpants daily, giving each pair time to recover.
• Check the zippered pocket and seams periodically for loose threads and trim them rather than pulling.

Your Hiyo sweatpants wash routine

1. Turn inside out and close zippers: Flip the sweatpants inside out and zip any pocket closed before they go in the drum. Checkpoint: an open zipper can snag fleece and scratch other clothes.
2. Wash cold on a gentle cycle: Use cold water, a mild detergent, and a delicate or gentle setting with a light load. Mistake to avoid: warm or hot water relaxes cotton fibers and starts shrinkage.
3. Skip fabric softener: Leave out softener and dryer sheets, which coat the fleece and reduce its softness. Checkpoint: if the pants feel coated, rinse once more with plain cold water.
4. Air-dry flat or hang by the waistband: Lay the sweatpants flat on a rack or hang them from the waist, away from direct heat. Mistake to avoid: hanging by the cuffs stretches the fabric downward.
5. Store folded, not hung: Once fully dry, fold the sweatpants and keep them in a drawer. Next step: rotate pairs so each one gets a rest between wears.

Product details that affect how you wash them

• never wasted sweatpants: 80% organic cotton / 20% recycled polyester fleece with a hidden zippered pocket inside the left pocket. The high cotton content responds to heat, so cold washing and air drying protect the fit; closing the zipper before washing prevents snags.
• happy in your own sweatpants: 80% cotton / 20% combed cotton, 3-fleece, high-stitch fabric, midweight, with a drawstring elastic waist and cuffed ankles. The midweight fleece and cuffed ankles can stretch if hung wet, so dry these flat to keep the cuffs and waistband in shape.

Cold water, a gentle cycle, and air drying are the three habits that keep Hiyo sweatpants from shrinking. Treat the fleece gently, close the zippers, and store them folded. Your pair will stay soft, comfortable, and true to size for far longer.