If you compare linen vs cotton sheets in terms of breathability, another major difference emerges — linen will keep you much cooler at night because of its longer fibers and, therefore, looser weave. Air can pass through linen more easily, keeping your body cool. Cotton, as previously discussed, can also be perfect for warm sleepers (in the case of percale bedding), but linen definitely has the edge over it.

Blanket Cover
A blanket cover is a very lightweight decorative covering that is layered over a blanket, almost like a decorative top sheet. A blanket cover is often used on hotel beds as the outermost layer over a blanket, protecting the blanket so it won’t need frequent laundering. The fitted sheet, flat sheet, and blanket cover can be pulled off the bed and washed in a single load. Blanket covers are usually poly/cotton blends, requiring very little attentions; no ironing necessary. 

Bed Coverings 101 – Quilts, Coverlets, Duvets: What’s the Difference?