This fin is Unbelievably light... 3.7 Ounces or 105 Grams! See the picture of the water bottle that weighs the same 3.7 ounces.
It is strong and stiff. The Riviera surf race is a hybrid fin that has excellent release in flat water and was designed to be an all around SUP Race Fin.
Not too much rake, not to vertical not to deep, not too shallow.
Most our team riders use this fin for every condition.