Tubular skirt, sarong (type of skirt); cover to sleep under, blanket.
The garment consists of a length of cloth sewn together. It is folded over at the waist and tucked in to hold it in place. It is worn by women as an every day garment. Men also wear it for worship service and to sleep in (that is often a longer one olos binūs). An olos is also used by women for bathing in. Then it is wrapped around under the armpits and tucked in. Often it is used as a sabley, a cloth worn diagonally over one shoulder, or as a head covering to keep off the hot sun, or as a hammock for the baby or just to tie things up into a bundle.
My tubular skirt (serves as) blanket when I sleep.