The PUMA Celerity Knit SD work shoe offers an incredibly comfortable fit while still providing superior protection from any workday dangers. Style numbers: 642905 (Blue) and 642915 (Pink). SAFETY KNIT textile upper is made of an ultraflexible textile fabric that perfectly adapts to the foot and fits like a sock. Designed for a better fit for a woman's smaller foot. Traditional lace-up system for a secure fit.