Greenough 4-A 10" (Black) - True Ames blanket Twin fin (futures) with side

Twin fin (futures) with side bite boxes

• Made for cool water: 56 - 65° F / 13 - 18° C

reminds us just how minuscule and insignificant we are relative to the powers of the sea

it’s the ideal top for slow days in the sun

Fleeced lining

Greenough 4-A 10" (Black) - True Ames blanket Twin fin (futures) with sideThere is a reason this is the most iconic, functional and versatile single fin available it works on just about anything! The Greenough 4 A has been our bread and butter for close to 40 years now, and is still the most popular single fin design there is. A truly well balanced fin the full base coupled with the tapering, moderately flexible tip provides a solid amount of drive off the bottom, and an acute responsiveness through arcing turns. Designed