Solid Snake can grow his facial hair after being shaved. If the player picks up the Shaver in Strut A of the Big Shell near the Deep Sea Dock, and give it to Snake when they first meet on Strut B, he will be clean shaven when they see each other again after escaping the Torture Room. However, if the player waits a week his facial hair will grow back.
Contributed by ZpaceJ0ck0