I suggest googling and ordering online. If she is a 1/2 size always order up one size.
By googling you can see a picture of the style, description of materials and review the customer reviews.
I know we all want to purchase in person but sometimes the big box stores don’t quite have the quality we desire.
Doctors advise replacing slippers yearly, but that is no challenge with their salaries! Lol!
You can Google slippers without memory foam and a nice selection comes up!
Lands End appears to be what you are describing and comes in many colors, designs! Generally thought to be a reputable brand.
The Leftists have left us!