They have the same blade design, the difference is that the Slipstreams are made of monoprene and are about half the weight. The blade is also significantly stiffer, but they swim about the same in the water. The major difference I have noticed in the water is that Slipstreams back kick a bit better due to the stiffer blade.
Beyond that, the foot pockets on the M, L and XL Jet fins tend to be fairly narrow, while the Slipstreams have a slightly wider foot pocket profile.
Beyond that, the foot pockets on the M, L and XL Jet fins tend to be fairly narrow, while the Slipstreams have a slightly wider foot pocket profile.
