Ko te rīpene pahuka he mea hanga ki te EVA, PE ranei te pahuka i te turanga, ka pania ki te whakarewa-whakarewa (me te wera-rewa) whakapiri pehanga-tairongo ki tetahi taha e rua ranei, ka pania ki te pepa tuku.He te mahi o te taatiraa me te ru absorption.