Aqua Lung Stratos 3 Full Foot FinsThe best all around full foot fin for warm water. And it's so durable, it passed every anti shock and stress test we subjected it to! But Stratos 3 doesn't compromise on price or comfort: it's lightweight and affordable. The four channel structure forces water to flow along the blade for heightened swim performance. Features: Torsion Energy Point. We targeted the bending point in this fin and moved it backward to create a more powerful kick with less