COMPLETE PROTECTION: Provides full 360° protection for your mattress. Encasing all 6 sides, for complete protection against bed bugs & allergens. Waterproof top and sides to protect from spillages and moisture to keep your mattress fresh, dry and hygienic. Fits mattress depths up to 30cm. ANTI BED BUG: Provides impenetrable protection against bed bugs and dust mites, helping you to sleep safe and sound. Ideal for mattress flippers, rented accommodation or students who desire extra protection. WATERPROOF: Waterproof top and sides for comfortable stay dry nights. The waterproof polypropylene backing helps to keep your mattress dry and protected from spillages or accidents. Check the waterproof layer with the Silentnight label is on top/surface of your mattress when fitting. Quiet & rustle free. SECURE ZIP: The secure zip maintains the complete protection for the mattress and allows for easy fitting and removal. Fits mattress depths up to 30cm. Please check your mattress depth to ensure a comfortable fit and prevent any strain on the zip closure. HYPOALLERGENIC: Kind to skin and does not include any contents likely to cause allergies. MACHINE WASHABLE: Fully machine washable so you can keep your mattress feeling super fresh and hygienic for longer.