BE961MO ke copolymer ea heterophasic. Sehlahisoa sena se khetholloa ka motsoako o motle oa ho tiea ho hoholo, ho thekesela ho tlase le matla a tšusumetso e phahameng haholo. Sehlahisoa sena se sebelisa Borstar Nucleation Technology (BNT) ho eketsa tlhahiso ka phokotso ea nako ea potoloho. Lihlooho tse hlahisitsoeng ka sehlahisoa sena li na le thepa e ntle haholo ea ho tlosa, thepa ea mechini e leka-lekaneng hantle le botsitso bo botle ba boholo mabapi le mebala e fapaneng.