Hiking pillow case from sweatpants
After seeing a post on here recently of a pillowcase made from fleece, I knew exactly what to do with my least favorite sweatpants.
After cutting off the factory seam, the back panels were *just* wide enough to cut two pieces to match my pillow when uninflated. I added no seam allowance to the pieces, stretch stitched with about 1/4" allowance, and serged. It's a snug enough fit to be just slightly fiddly to get on. If I did it over, I may have cut in the corners a bit closer.
I opted for an envelope closure for simplicity and ease of washing. The overlap sits right around the valve so I can deflate the pillow without taking it off. I think the velour finish on the pillow should keep it from sliding too much, but it is yet to be road tested.
This cover brought the pillow from 72g to about 113g or about 4 oz-- probably wouldn't make sense for ultralight backpacking, but that's not my style.