The2Toms BlisterShield Protective Foot Powdercreates an almost frictionless surface on the foot reducing heat build-up and blister formation. When applied to the foot this powder keeps skin dry and blister-free for lengthy periods of activity. Blister Shieldsignificantly reduces discomfort and fatigue resulting in increased performance and a more pleasurable exercise experience. Other “all natural” blister prevention products on the market are derived from plant and animal fats and function similarly to greases and ointments. Most inorganic powders absorb moisture and reduce friction; however as they absorb moisture their effectiveness in reducing friction declines.BlisterShield’stechnologically advanced blister prevention formula never loses its effectiveness…. from start to finish 2Toms BlisterShield Protective Foot Powder Features Eliminates the friction that causes foot blisters and hot spots when running Long lasting: 24 hour protection with single application Waterproof Heat proof ( wont melt ) Non-staining non-toxic non-greasy Unscented Conatins no animal products