Here's why:
* Semi-permanent dyes deposit color onto the hair shaft but don't penetrate into the cortex (inner layer) like permanent dyes do.
* They gradually fade with each wash, typically lasting 4-6 weeks.
* Just for Men's specific formulations may have slightly different fading rates, so it's always a good idea to check the product instructions.
If you're looking for a permanent hair dye, Just for Men is not the right choice. You'll need to look for a product specifically labeled as "permanent" or "long-lasting."