The Marana Vulc is a slimmer version of the instant classic Marana that is built on a vulcanized outsole. The rubber printed toe cap offers durability and the STI Evolution Foam insole provides excellent rebound and cushioning without packing out. The mesh tongue and collar lining provide breathability while the reinforced upper provides support. Features: STI EVOLUTIONÂ FOAM insole. Performance & Durability Redefined. Foam Lite 1 insole. Vulcanized outsole. Rubber printed toe cap. Mesh tongue and collar lining.