F1 is Bay Area breeder Jigga's personal sativa strain that he crossed to Durban to make F1 Durb, and thus, GSC. Jigga reportedly dubbed it "F1" due to its immediate, soaring, jet-like sativa effects.

 F1 is often sought out for its super high level of potency and giddy daytime effects that make for the perfect high-energy wake-and-bake for a day when you really need to get out of bed and moving. That being said, the effects of F1 come on fast and hard, slamming into your brain with an immediate sense of high-flying energy and sociability. You’ll find conversations come easily as your creativity flows and your mind soars higher and higher into a state of pure focus and giddy euphoria. This can increase with no ceiling, so mind your dosage if you tend to suffer from any anxiety or paranoia

• Strain Type: Sativa 
• Effects: Creative, Energetic, Uplifted
• Aroma Flavor: Tropical, Fruit Tree, Pineapple 
• THCa %: 29.3%
• Label Color: Black Label (Top Shelf)
• Helps With: Appetite, Fatigue, Depression