The Lotus Crib and Lotus Bassinet don't come with sheets, but the mattress is approved for sleep without a sheet (and many little ones find it plenty comfy).
The mattress cover that comes on the Lotus Crib is removable and washable. Because it's a waterproof material, some customers prefer a sheet for a slightly softer surface.
We offer a few options for sheets for the Crib that you can see here.
Note: The cover on the Bassinet mattress is not removable (but still waterproof and easy to clean with a cloth).