I've already got the linen on the cot ready to go, but I've covered the whole lot with the plastic wrapping that the mattress came in to stop dust settling on the sheet. In the bassinet, I put mattress protectors on weeks ago (not using sheets), but I will place a terry nappy under him and tuck it under anyway, so I don't really care if the matt. prot. gets a little dusty. Might just pass a lint roller over it when we get home from hospital.