1. SoftHeaven Topper Cover All Around Zipper Non Skid Bottom Hypoallergenic Bed Bug Dust Mite Luxury Jacquard Velour Fabric Cover for 2", 3", or 4" thick Memory Foam Latex Mattress Pad, King, 76" x 80" (Click Link to Check Price on Amazon)
Editor's Rating : 8.8 out of 10
COVER ONLY! Topper not included.This cover can be used for 2, 3 or 4 Inch Memory foam or Latex mattress Pad Topper

2. Waterproof Mattress Encasement - Zippered Bed Bug Proof Mattress Cover with Ample Zipper Opening - Mattress Protector, Ultimate Protection Against Insects and Dust Mites (Twin) by Utopia Bedding (Click Link to Check Price on Amazon)
Editor's Rating : 9.6 out of 10
Fits twin size mattress perfectly with dimensions 38 inches by 75 inches 15 inches deep pocket

3. Premium Zippered Waterproof Mattress Encasement - Bed Bug Proof Mattress Cover - Ample Zipper Opening for Mattress Protector - Protection from Fluids, Insects and Dust Mites (Queen) by Utopia Bedding (Click Link to Check Price on Amazon)
Editor's Rating : 9.6 out of 10
Fits queen size mattress perfectly with dimensions 60 inches by 80 inches featuring deep pockets to adjust to 15 inch mattress depthThick knitted polyester fabric is not only soft and breathable but also highly durable

4. LANGRIA 3-Inch Gel-infused Memory Foam Queen Mattress Topper with Removable Zipper and Hypoallergenic Bamboo Cover (Click Link to Check Price on Amazon)
Editor's Rating : 9.8 out of 10
3-INCH GEL-INFUSED MEMORY FOAM: Our memory foam mattress topper is infused with cooling gel to reduce trapped body heat and distribute cool air throughout the mattress. Helps you maintain a cool, comfortable temperature all nightHYPOALLERGENIC COVER: the outer bamboo cover is antibacterial, hypoallergenic and removable for machine wash

5. Bed Bug Proof Quality Mattress Cover Protector with Zipper Encasement by Abstract (78" x 80" (King)) (Click Link to Check Price on Amazon)
Editor's Rating : 9.7 out of 10
Made of thick material through which the bed bugs cannot pass100% polyproplene. Durable stitching .