All Sequins and Lycras (stretchy things): can be hand washed in cold water with gentle care detergents meant for wool and silk (like Woolite) and hung to dry. Try to wash them as infrequently as possible.
For leather: we recommend using a professional leather cleaning service.
To remove playa dust and dirt from feather tops and skirts we recommend pressurized air (like you use to fill tires) use it CAREFULLY in small short bursts going with the length of the feather (from top to bottom). This works well for fur, suede and sequins as well.