Teva - Proton II (Blue Bell) - Women's: An update to the original Proton, our newest version is more breathable, very low profile and super sticky. High-abrasion 4-way stretch mesh upper. Large diameter pull loops. 3D wrap-over outsole. Low profile Spider Rubber outsole is Teva's most versatile rubber compound that successfully blends high friction and good durability. A non-marking rubber that performs exceptionally well on wet and dry terrain. Park & Play Traction System is designed to provide maximum surface contact in the lowest profile possible. 2mm lugs balance traction and minimalism.