Liquid Fabric Softener; Fight Static + Soften. Ingredients Biodegradable Fabric Softening Agents (Cationic). Warnings Liquid fabric softener can increase fabric flammability. Using more than recommended can increase this effect. Do not use this product: On children's sleepwear or garments labeled as flame resistant as it may reduce flame resistance. On garments made with fluffier fabrics (such as fleece, velour, chenille, and terry cloth).