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KleenCover® 9" Stretch Knit Box Spring Encasement


KleenCover® 9" Stretch Knit Box Spring Encasement


Mattress Safe® Stretch Knit Box Spring Encasement with the patented “Zipper with the Hook”®. A sewn in loop and zip-tie is included to ensure tamperproof encasements. Color encasements are made at the time of order. Please allow 10 – 15 days for production.
  • Bed Bug Certified
  • Breathable
  • Fire Retardant: CFR Title 16 Part 1632
  • Impermeable to Bed Bugs and Dust Mites
  • Patented "Zipper with the Hook"®
  • Plus+ Advantage Sizes
  • Single and "Split" Box Spring Sizes (see chart below)
  • Comes with Felt Corner Protectors 
  • For additional protection, use the 
  • Felt Full Frame Box Spring Encasement Protectors
  • Made In USA

Do You Have A "Split" Box Spring?

Before ordering your box spring encasement, make sure your mattress has a single or a "split" box spring set. If you have a King or Queen mattress, use the table below to order the proper box spring encasement for your box spring configuration.

Mattress Size Box Spring 
Order This Box Spring Encasement
Queen ( 60"x80" ) Split Order 2 Split Queen Box Encasements
Queen ( 60"x80" ) Single Order 1 Queen Encasements
King ( 78"x80" ) Split Order 2 Twin Plus+ Encasements
King ( 78"x80" ) Single Order 1 King Encasements
California King ( 72"x84" ) Split Order 2 Cal Twin Plus+ Encasements
California King ( 72"x84" ) Single Order 1 King Plus+ Encasement
Hotel King ( 72"x80" ) Single Order 1 King Plus+ Encasement


 King Box Spring
King Split Box Spring
Single Box Spring
Split Box Spring Set



Plus+ Advantage

Plus+ Advantage® Sizes

Plus+ Advantage® sizes stretch to fit a variety of mattress depths and lengths, including regular and long sizes. Plus+ Advantage® brings you the versatile answer to mattress and box spring protection.

  • The Twin Plus+ Mattress Encasement stretches to fit Twin and Long Twin. 
  • The Full Plus+ Mattress Encasement stretches to fit Full and Long Full. 
  • The King Plus+ Mattress Encasement stretches to fit California King and Hotel King. 

How To Measure Your Mattress Correctly

It is important to properly measure your mattress and box spring frame before purchasing an encasement. Due to hygiene and bed bug concerns, we are unable to accept exchanges and returns on opened or used products.


For your protection against bed bug infestation & other forms of sanitation, Mattress Safe, Inc. does not allow returns. In the event you receive a defective product, please contact us immediately for warranty claims.

Mattress Safe, Inc. Products with manufacturer defects must be reported within 24 hours of delivering. Purchaser is responsible for ordering correct product sizes and acknowledges properly measuring the mattress & box spring.

For health concerns, Mattress Safe, Inc. does NOT accept returns of ANY product. Please do not return any new, used, damaged, or soiled products to Mattress Safe, Inc.

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