T-shirt and backpack when the straps chafe

Short answer: When backpack straps chafe, it is often the combination of pressure, sweat and fabric surface that causes it. A T-shirt with smooth fabric, flat seams and a sensible fit can reduce the rubbing, but not remove it completely.

Where the chafing comes from

Straps press the T-shirt against the shoulders, and with every step the fabric shifts a little. Together with sweat, friction builds up and can cause redness or sore spots. It depends on how the backpack sits and what you wear beneath it, so both are worth a look.

Fit under the straps

A T-shirt that is too loose can fold and bunch up under the straps, and the folds chafe. One that is too tight pulls on the seams. Choose a cut that lies calmly on the shoulders without straining, and check that the fabric does not gather when you raise your arms.

Seams and labels on the shoulder

Thick or raised seams across the shoulder sit exactly where the strap runs. Check whether the seams are flat, and turn the T-shirt inside out to see them. A stiff label at the neck can chafe against a backpack, so cut it out carefully if it bothers you.

Fabric and moisture on longer trips

On a long walk the T-shirt becomes damp, and damp fabric rubs more than dry. A soft, breathable fabric often feels better, but change shirts along the way if you can. Keep a dry one in the backpack so you can swap at a break.

The backpack, not just the T-shirt

Adjust the straps so the weight sits high and close to your back, and use the hip and chest straps if it has them. That moves some of the pressure off your shoulders. Pack heavy things close to your back and avoid hard edges pressing through your clothes.

Long sleeves as protection

If the straps chafe straight onto bare skin at the upper arm, long sleeve models give an extra layer for the straps to rub against instead of your skin. This makes a difference on long trips. If it is warm, push the sleeves up once the backpack is off.

Washing so the fabric keeps gliding

Do not let sweat and salt dry into the T-shirt. Rinse or wash it after the trip and follow the care label. Turn it inside out so the smooth side is protected in the machine. A fabric that turns rough or lumpy chafes more, so it is worth looking after.

The rest of what you wear on the trip

The same friction can hit the groin and thighs on long trips. Bamboo T-shirts for men together with bamboo underwear for men in soft fabric give an even layer against the skin. If your skin becomes sore or irritated again and again, talk to your doctor.

Frequently asked questions

Why do backpack straps chafe on the shoulders?

The straps press the T-shirt against the skin, and as you walk the fabric keeps shifting slightly. Sweat increases the friction, and redness or sore spots appear easily.

Should a T-shirt for a backpack fit close?

It should lie calmly without straining. If it is too loose, it forms folds under the straps and the folds chafe. If it is too tight, it pulls on the seams.

Can I avoid chafing completely?

Not always, but you can reduce it with flat seams, soft fabric, a well-fitted backpack and a dry T-shirt to change into. For lasting skin problems, talk to your doctor.