The suit can be create a superhydrophobic surface.
By creating a bubble of air around the suit, you can reduce drag in the water. You need a lot more depth to decelerate (so no shallow landings)
This is the remarkable result from a series of experiments that have for the first time shown objects sinking in water with close to zero drag, finally proving an 18th century theory in physics.
...The experiment looks simple. Drop a 2-centimetre-wide metal ball into a deep pool. The ball forms a large gas bubble in the shape of an elongated teardrop around itself and then the ball-plus-bubble sink together. Do the maths and it turns out that this ball experiences ten times less drag than a solid object with the same shape.