Crystal Rocks Tawas deodorant prevents body odour for more than 24 hours. Tawas or Potassium Alum also be used as an aftershave. Natural antibacterial properties of potassium alum/Tawas prevents bacterial growth that causes bad body odour Hence, you can be sure to be smelly no more! Long lasting and 100% effective. Just wet the stick and apply generously on your underarms or any affected areas after a shower. Can also whitens underarms No harmful chemicals, just natural mineral salt Economical, 120g stick lasts 6 months or more!