Fragrance Free, Hypoallergenic, Biodegradable and Antimicrobial. EcoNuts are the biodegradable and organic alternative to chemical detergents. EcoNuts are completely sustainable dried fruit shells that contain saponin, a natural cleaner lifting stains from fabric and leaving dirt suspended in the water to be rinsed away. Gentle on both clothes and skin and leave no harmful residuals on fabrics. Trial Size 5 - 7 loads