Fit One is specifically designed for those with lower volume feet, as it runs narrower all around. If you find some traditional brands to be too roomy or wide, or find they leave you sliding around, the Fit One should be the right shoe for you. It has a dialed-in, women’s specific heel hold which eliminates heel slippage that causes discomfort and friction (a common culprit of heel blisters). The midfoot offers a secure and supportive experience for average or narrower feet without feeling too constricted. This fit is perfect for those with longer second/third toes, and feet on the narrower side.