JML Trading via Amazon discounts the JML Waterproof Mattress Protector in the sizes listed below via coupon code "NCWQKIUF". Plus, Prime members bag free shipping. That's up to $4 under our March mention, at least $17 off, and the lowest price we could find. It has a fitted sheet style. Deal ends May 30. The sizes, with prices after coupon:
  • Twin for $11.19 ($20 off)
  • Full for $12.79 ($17 off)
  • Queen for $14.39 ($21 off)
  • King for $15.99 ($18 off)