NWT Herschel™ Classic Mini Backpack - Lisa Simpson. OS, New with tags. Awesome Simpsons Mini backpack. Please see the pictures for measurements. Questions? Leave a comment below! Custom print. 100% recycled main body fabric. 100% recycled fabric liner with custom cloud print, zippered closures, adjustable slim straps, front pocket. The Simpsons flag label internal co-branded label. Limited edition and sold out.