SafeRest Premium 9" Thick Box Spring Encasement - Waterproof - Breathable, Noiseless and Vinyl Free - Fits Up to 9" - FullXL

Surrounds the box spring on all 6 sides with a durable high-grade polyester surface material
Exclusive Micro-Zipper technology. 360 Secure zipper feature prevents accidental openings by sealing the end zipper traveler with a Velcro flap Polyester