They look like a little pillowcase with a fold over flap.
Depending on the size, you insert two to four scrubbed potatoes wrapped in a peper towel and bake in the microwave for 10 to 15 minutes. Same for corn.
I'll try to post a picture here today.
Mine is the hot pepper one. Turned inside out you can see the seams on the side.
I made several after looking at Evie's.
8 x 44 inch rectangle of fabric. 8 x 19 inch piece of high loft polyester batting (it works best in microwave)
Fold the rectangle in half right sides together. Sew the two eight inch selvage sides together. Turn right side out and press.
slip in the batting and pin to the folded end of the rectangle. Baste the sides to secure the batting inside.
You will have about 2 inches on the selvage end that does not have batting. Fold this over and pin at the sides. This makes the closing flap. Bring the other end up and pin on top of the flap so that the batting ends line up and seam both sides.
Turn you bag inside out.
When you use, you put your potatoes in and pull the flap over the end to close the bag and microwave.
Here is the information she included with the bag , You can see it in the photo.
POTATOE BAG
This simple bag creates a "just right"
baked potato in your microwave. The
inside is well done yet moiist, while the
skin remains tender. The bag will cook
up to 4 nice baked potatoes at once.
DIRECTIONS
Simple wash and dry your potatoes.
DO NOT PRICK THEM
Place the potatoes in the bag. Follow
the microwave instructions, ususally
10-15 minutes. When serving, do not
cut open the potato with a knife, simply
use a fork. Enjoy your fluffy potatoes.