Is the SleepSack Swaddle chemically treated with flame retardant chemicals? December 18, 2024 20:19 Updated No! The fabric and fibers used to make our garments are not chemically treated in any way. Related articles Does the SleepSack Swaddle meet the Consumer Products Safety Commission (CPSC) guidelines for fabric flammability? Is the SleepSack Wearable Blanket chemically treated with flame retardant chemicals? What is a TOG Value? Do your products contain flame retardant? Why is the zipper upside down?