US Patent 7114269 Athletic shoe with improved sole

A shoe has an upper, a foot support region positioned below at least a portion of the upper to support the bottom of a user's foot, a sole secured below the foot support region, and a flexible member positioned below at least a portion of the foot support region and above at least a portion of the sole. The flexible member has a top surface, a bottom surface, a peripheral portion, and an interior portion. The interior portion of the flexible member deflects in use in a direction substantially perpendicular to a major longitudinal axis of the shoe. At least a portion of the peripheral portion is restrained from movement relative to the interior portion in a direction substantially perpendicular to the major longitudinal axis of the shoe.