"THE NEXT GENERATION IN HAIR STRAIGHTENING FORMALDEHYDE FREE RIGOROUSLY TESTED AND PROVEN CONTAINS NO ALDEHYDES OR FORMALDEHYDE PRODUCING CHEMICALS The most effective straightening system for damaged hair, Magic Sleek has been developed with many natural ingredients found in the Amazon rainforest; these components are rich in Omega 3 and Omega 9 unsaturated fatty acids, which offer nutrition to the hair.