What pre shrunk means

Short answer: Pre-shrunk means the fabric was shrunk at the factory before the garment was sewn. That is why it shrinks less when you wash it yourself. Here is how it is done, what to expect and what you can do to keep the measurements.

What pre-shrunk means

Pre-shrunk means the fabric has already been through a shrinking process before it was cut and sewn into a garment. The shrinking is done in advance, so it does not have to happen in your washing machine. That makes the measurements more stable, which is why the word often appears in a product description.

How it is done

The fabric is run through heat, steam and moisture under controlled conditions so that it draws in before it is cut. The shrinkage that would otherwise happen at your home therefore happens beforehand. The fibres get to relax, and the fabric settles at its final size before sewing begins.

Why it is an advantage

Without pre-shrinking, the maker would have to allow for the fabric shrinking at your home, and the garment would soon be too small or too short. With pre-shrinking the size fits better after the first wash. That makes it easier to choose correctly and means fewer disappointments once the clothes have been in the machine.

What to expect

A pre-shrunk garment typically shrinks by less than two percent in the first wash. Without pre-shrinking, a garment can shrink five percent or more. The difference can be felt in the length of a t-shirt or in the sleeves. See bamboo tank top for men and read the description for material and care.

Why heat is the problem

Heat is the biggest single cause of shrinkage. The fibres draw together when they get warm and wet, and they do not return by themselves. That is why it is not only the first wash that counts. Each time a garment meets high heat, it can draw in a little more.

How to wash

Wash cold or as the label says, and choose a gentle programme if it is listed. Avoid overfilling the machine so the clothes are not rubbed and pulled. Turn the garment inside out if you like. See Bamboo Basics for everyday clothes, where you can read the care instructions on each item.

How to dry

Avoid the tumble dryer, because heat is exactly what makes fabric draw in. Line drying without stretching the garment is enough to keep the measurements. Lay it flat or hang it on a hanger, and gently pull it into shape while damp. See bamboo dresses, where fall and length matter.

If it does not say pre-shrunk

If the product description does not say, you cannot be sure. The maker only states it when it applies. Then measure the garment before and after the first wash and write the numbers down. That way you know how much it draws in, and you can use it the next time you buy something similar.

How to measure

Lay the garment flat on a table and measure the length from shoulder to hem and the width under the arms. Take the same measurements after the first wash and compare. Wash and dry as you normally do, so the number fits your everyday life. It takes a few minutes and gives you a good overview.

Frequently asked questions

Does pre-shrunk clothing not shrink at all?

Yes, a little, especially in a hot wash. Pre-shrinking limits the shrinkage but does not remove it, so cold washing and line drying are still the best advice.

Where does it say so?

In the product description, if the maker states it. Read the details on material and care, and ask customer service if you cannot find the information on the product page.