The Mick Fanning Twin by FCS has been inspired by the revolutionary FCS H4 fins. The template of the fin is very similar but larger. The base gives it plenty of drive. The unique tip of the fin makes sure it just gives enough hold and a little bit of release. These fins will not slide out like some other twins do. They offer a great balance of speed and control. A trailer is included in case you need more stability. The construction is made of Performance Core + Aircore.