Micro-Guard Antifungal 2% Strength Powder, 3 oz. Shaker Bottle is clinically proven to be effective in the treatment of most athlete's foot (tinea pedis), jock itch (tinea cruris) and ringworm (tinea corporis). It provides a moisture barrier to protect the skin from external moisture, while the miconazole nitrate treats fungal infections. Can also be used to treat such conditions as superficial yeast infections (candidiasis), athlete’s foot (tinea pedis), ringworm (tinea corporis) and most jock itch (tinea cruris).