FCS has been making high-quality surf fins for years, and the Kelly Slater K2.1 Tri Fin Set is no exception.

• Drive: Level 3 out of 5.
• Pivot: Level 1 out of 5.
• Hold: Level 1 out of 5.
• Side Base: 4.33".
• Side Depth: 4.53".
• Side Area: 15.23".
• Side Sweep: 32.0°.
• Side Foil: Flat.
• Center Base: 4.28".
• Center Depth: 4.41".
• Center Area: 14.22".
• Center Sweep: 31.0°.