With its minimalist, Scandinavian-inspired design approach, hummel has for decades brought a distinctly Danish perspective to the otherwise preppy sport of tennis. ST Power Play dates back to the 1980s, the heyday of hummel on the courts. Their democratic design language and accent focus on functionality make them a staple of the hummel brand. PU upper TPR outsole Low model Tennis model. Outer material: synthetic Inner material: synthetic Heel shape: no heel Shoe Width: Medium Water resistance: not waterproof