SEBS is actually a form of thermoplastic elastomer (TPE) with styrene added. Green Peace lists SEBS as an acceptable alternative to PVC in toys. Polyolefin plastics such as Polyethylene (PE) and Polypropylene (PP) are the most common building blocks for SEBS, which don't need plasticizers (like phthalates) or stabilizers (like lead) for flexibility.
SEBS is used in a wide variety of general-purpose rubber items as well as in handlebar grips, toothbrushes, sports mouth guards, diapers (as the elastic component) and teethers. The chemical resistance of SEBS is similar to natural rubber, having excellent resistance to water, acids, and bases.