Topsheet

A topsheet is a thin flat sheet placed between a guest and the duvet, a layer some hosts skip and others treat as essential depending on the style of bed they run.

Why some flats use one and others do not

A topsheet protects the duvet cover from direct contact with a guest, meaning the cover needs washing less often relative to the sheet underneath. Whether that trade-off is worth the extra linen item to swap on every turnover is a genuine style choice, not a fixed standard.

What it means for a turnover

Adding a topsheet means one more item counted, folded and swapped on every single turnover, a small but real addition to the linen inventory a host needs to own multiples of. Neither choice is wrong, it depends on the bed style a listing is going for.

Conclusion

A topsheet is a style choice with a small logistics cost, not a requirement for a well-run turnover.