More specific details are below described on the Teva site:
Our Spider Rubber + JStep outsole will stick to a grease-covered aluminum ramp (true story). Wet rocks won't be a problem.
Drain Frame™ sheds water like a sieve, keeping your sandals dry and light
The perforations in the sole were done with freakin' laser beams (no sharks though)
*So which color Teva Fuse-Ions will you be getting?*