This generous 5 pack is currently for sale on Amazon with over 100,000 positive reviews (link at bottom) for almost $40 plus tax.  Save over half.  Individually wrapped - good gift giving idea.
 
Amazon Basics 13.3-Inch Laptop Sleeve - 5-Pack: These black sleeves protect laptops and tablets from everyday damage with their slim design, top-loading zipper, and portability. Each measures 13.5 x 9.6 x 0.8 inches and the pack weighs 5.75 lbs.
 
Versatile - see if it will fit your family's tablet and notebook computers.  Also perfect as a gift for school classmates.
 
https://www.amazon.com/AmazonBasics-13-3-Inch-Laptop-Sleeve-10-Pack/dp/B00JM5TCXK?th=1