GO!!! Select Soma undies are 5 for $15 and it even includes some of the Vanishing Edge styles! These are so good, the only ones I’ve found that don’t show lines AND don’t ride up. You may want to add a bralette to your order too – only $7 (reg $40)! (commissioned links)

5 for $15 undies — https://shopstyle.it/l/bxnJV
Bralettes — https://shopstyle.it/l/bxnJW
Full sale — https://shopstyle.it/l/bxnLs