Acetate

Used often in linings because it does not pill or suffer from static cling, acetate is also made into dresses, suits and sportswear.
Most acetates are dry-clean only, but some are washable.
For the washable variety, you typically hand wash in warm water with mild suds. (Don’t soak coloured items.)
Do not wring the item dry. Instead, lay it flat to dry.
While it’s still damp, press it inside out with a cool iron.
If you are finishing the right side, use a pressing cloth.
When removing stains from acetate, never use acetone or a nail-polish remover that contains acetone.
The acetone will dissolve the fibres.
Acrylic

Known for its ability to draw moisture away from the body, acrylic is a popular material for socks, as well as other clothing items.
Garments made from acrylic can be washed or dry-cleaned.
Generally, you should machine wash, using a warm-water setting.
Add a fabric softener during the final rinse. Acrylics are heat-sensitive, so tumble dry at a low temperature.
To avoid wrinkling, remove from the dryer as soon as dry.When hand washing is required, as with delicate items, use warm water and a mild detergent.
Rinse and gently squeeze out the water, smooth out the garment and dry on a rustproof hanger. Lay jumpers and knits flat to dry with a clean towel underneath.
For ironing, use a moderately warm iron.
Alpaca

Made from the fine, soft hair of the alpaca, a cousin of the llama, alpaca is gaining in popularity as a substitute for wool.
Nearly all alpaca can be dry-cleaned, and some can be gently washed.
Woven items should be dry-cleaned, whereas knitted garments, such as jumpers, should be washed by hand in cool water with a mild, undyed soap or shampoo.
Don’t twist or wring.
Lay them out flat to dry, pressing with a dry towel to remove excess water.
Touch-up with a cool iron as needed.