No, not solent or staysail sheets. Bed sheets! The mattresses in the forward cabin are comfortable and roomy, but they are weirdo shapes. Some owners get custom made sheets for them, which is a great idea. We bought single bed sheets from IKEA in Caen while we were driving past and they fit pretty well, with a bit of wrestling. They also allow us to use the leeboard (optional), which fits between the mattresses.
Garcia provide posture slats to go under the mattresses in the forward and aft cabins. These are good for comfort but also for controlling condensation. We’ve been here in Cherbourg in a cold and wet winter, yet there’s been no condensation under the mattresses. Good! 🙂