If you're referring to textile liners: Machine wash cold, gentle cycle, mild detergent, air dry or gentle/low heat in a dryer, then fluff. Do not use fabric softener.
If you're referring to helmet liners: Remove from helmet and place in a zippered mesh bag specific to laundering (can be found at a dollar store). Machine wash cold, gentle cycle, mild detergent, air dry. Do not use fabric softener. These tend to dry fairly slowly due to the foam's density. If you're in a hurry put it in the sun in low humidity. Otherwise, wait it out.
3 weeks, 5 days ago