C4 is a (potentially) fairly potent (THC levels reported ranging between 29-35%), blissful and optimistic, (some say) slightly Indica-Dominant daytime hybrid mix of Shishkaberry and either Cotton Candy or Frostbite. Smelling and tasting of fruit, earth, citrus and pine, this long-lasting strain can be lucid and powerfully relaxing and is often used in the production of concentrates.