sens.us cover up hair and beard - 60mlSHAKE UP is a range that has been formulated to camouflage white hair. The intensity of the result can easily be adjusted, and development times are short (from 0 to 20). Checking progress regularly is recommended. The gradual development of COVER UP means white hair is effectively covered without affecting dark hair. It creates an extremely natural looking effect and lasts for 2 4 weeks with no regrowth effect or undesired colour changes.