Women's SONICBLAST PURPLE Continental™ Rubber outsole

Continental™ Rubber outsole

All natural coating that eliminates odor-causing bacteria

*A full discussion of caffeine and its performance benefits can be found in the Journal of the International Society of Sports Nutrition here

The upper provided a good fit

Glycerin GTS 21: The GTS 21 is slightly heavier due to the added GuideRails® support system

Women's SONICBLAST PURPLE Continental™ Rubber outsoleBounce beyond limits The SONICBLAST shoe offers a lightweight and responsive ride that makes it functional for tempo runs and your daily training.? The midsole features a two layered foam with FF BLAST MAX and FF TURBO cushioning to help create a lightweight, bouncy, and advanced cushioning running experience. Additionally, an ASTROPLATE propulsion mechanism is centered in the foam. This helps propel your momentum forward, creating a faster feel