5mm Marathon Sessions Split Toe Wetsuit Boots For Men. Anyone who says booties are booties has obviously never been in a situation where serious warmth and protection were needed. But that’s exactly what our 5mm Marathon Sessions Split Toe Wetsuit Booties deliver. Engineered with our exclusive StretchFlight neoprene, you can expect top-of-its-class construction focused on superior flex, strength, comfort, and blockage.