Twin size dust mite and bed bug cover recommended by allergists. Six-sided mattress protection with a zipper for maximum efficiency. The dust mite barrier is present on all six sides of the mattress protector for maximum efficiency (unlike the ones sold on Amazon or Linen Chest). The highest certification for D. Farinae (98,4%). All thickness sizes available. No vinyl (like those sold at Walmart). Canadian company (unlike Protec-A-Bed sold elsewhere, an American company). Save time and money by ordering online. $30 rebate/cover only available online. Express shipping with Canada Post: 1 to 3 days. 100% Satisfaction Guaranteed.