If you want a brand new T-shirt to have that soft, worn-in feeling, you don’t have to bide your time over months of wearing and washing -- you can soften it up right at home over a few days. A simple chemical treatment made using ingredients already stocked in your kitchen can transform a stiff shirt into one that’s cuddly-soft and ready for wearing.
Fill a bucket or tub with water, mixing in a half cup of salt for every quart. Stir until the salt is completely dissolved.
Soak the T-shirt in this mixture for three days.
Remove the shirt and wash it on hot with just a bit of detergent. The hot water helps weaken the fabric’s fibers, making it extra soft -- for this reason, you may need to experiment with different sizes, as the shirt may shrink a bit.
Tumble dry your shirt on high heat. Repeat the soak, wash and dry process as necessary.