A little TLC for my pressing mat

Hello, everyone.  Today it is, as usual in this part of the year, hot outside. I have been sewing during the hottest part of the day instead of working outside. 

I have a wool pressing mat that is wonderful.  It had developed a little bit of pilling--it is wool, after all--and I  thought maybe it needed something protective to keep abrasion and debris off of the felt.

Behold the mat pillowcase.  I measured it from the mat and allowed a little extra for turn of the cloth. There's a little pleat at the folded end for the thickness. The fabric is some cotton from the stash. After sewing the seams, I serged the raw edges to prevent fraying.