Wool shrinks in hot water and shrinks when dried in a dryer. As you can see the coarse and fine wool are the most likely to felt but alpaca and cashmere will also felt and shrink if agitated enough.
As long as you follow the recommended washing instructions for your clothes then the merino wool will not shrink.
Does wool shrink. When you are washing your wool clothing or bedding just double check the water temperature. Shrinkage occurs when the wool is put through temperatures that are too high usually from throwing them in the dryer. Wool is no exception as it is a delicate fabric at times.
The best way to avoid damaging and shrinking the garment is to hang them up to dry after washing them. Cotton and linen do not have memory and do not hold their shape well. Wool depending upon the weave is very mailable when wet unless it s boiled wool.
But if your goal is to shrink wool yes the dryer will work. Yes it doesn t take much to make wool shrink. Natural fibers tend to shrink and that may be due to their natural properties more than anything else.
A lot will depend on how the wool was woven and the quality of the fabric. Yes wool does shrink unfortunately. However if you want to steer his wool you can wash in cold water and stretch and block it to dry and it can in most cases be bright back to its original shape if it has been accidentally shrunken.
Some wool garments need to be dry cleaned while others require special wool soaps. Wool is one of the most sensitive and unpredictable materials out there. Those scales along with the crimp or curliness of the fiber are what gives animal fibers their memory.
Then there are those that say cavalry wool is the style that stretches the most. Some people say that wo o l will shrink back to its original size when washed but will conform to your body once you put the item back on again. They hold their shape well.