Things You'll Need
Liquid laundry soap
Lliquid fabric softener
2 tbsp. salt
1/2 cup white vinegar
Twill is any type of fabric that is woven in a diagonal pattern, as opposed to the satin or basket weave of other types of material. Examples of twill fabric include denim, chino, gabardine and tweed. A pair of jeans or tweed dress pants is durable and will last the wearer several years. But twill fabrics are also notorious for being stiff and uncomfortable at times. Properly washing, drying and handling twill pants will soften them up, making the experience of wearing them more pleasant.
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Place the twill pants in the washing machine. Wash twill items with like fabrics, and avoid laundering them with softer pieces or towels. The towels will cover the twill pants with lint, and the tougher fabric of twill may damage softer fabrics, such as satin.
Turn the machine to a hot-water cycle, and add 1 cup liquid laundry soap, 1 cup liquid fabric softener and 2 tbsp. salt. The salt will work into the fabric, softening it without causing any damage. For front loading washers, add 1/2 cup detergent and 1/4 cup fabric softener. Add the fabric softener to the fabric softener dispenser in both front and top load washing machines.
Allow the machine to run until the final rinse cycle. Open the washing machine, and add 1/2 cup white vinegar. Add the vinegar to any final rinse tray, if there is one found in your particular brand of washer.
Allow the machine to run through the final rinse and spin before removing the clothes.
Remove the twill pants from the washing machine, and place them in the dryer with a single dryer sheet. If the clothing's label does not recommend using a dryer, hang the pants outside to dry in the sun.
Repeat the process of washing and drying the twill pants if you didn't achieve the desired level of softness.