Nike Jr. Mercurial Vapor 13 Club IC Little/Big Kids' Indoor/Court Soccer Shoe FINESSED FOR SPEED. The Nike Jr. Mercurial Vapor 13 Club IC Shoe wraps your foot for streamlined speed on the street, court or indoor surfaces. Second-Skin Fit Soft synthetic material wraps your foot to feel like a second skin. Textured for Touch A micro texture from heel to toe gives you the touch you need for creativity at high speeds. Made for Motion Based on Nike Sports Research Lab analysis of player movements, the rubber outsole is designed to provide multidirectional traction on street, court and indoor surfaces.