Sarasati Lingerie Detergent is a specialized Japanese laundry product designed for delicate underwear care, particularly for removing menstrual blood stains, discharge, and other blood-related stains. This gentle, soap-scented detergent features a unique 20-minute soak formula that effectively removes even set-in stains without damaging delicate fabrics. Perfect for cotton, linen, and synthetic materials, it's damage-free and ideal for period panties maintenance. The 120ml bottle comes with measurement markings for precise usage, though it's not suitable for silk, wool, cupro, or rayon materials.