How to Replace the Liner in Your Memory Foam Dog Bed: A Step-by-Step Guide
By Wilderdog | Published: 2026-09-03
Category: How-to Guides
Learn how to replace the liner in your memory foam dog bed with this practical, step-by-step guide. Keep your dog's bed clean, dry, and comfortable.
Quick Answer
To replace the liner in your memory foam dog bed, first remove the old liner and foam, measure the bed's interior dimensions, and choose a replacement liner that fits snugly. For best results, use a waterproof liner to protect the foam from accidents and moisture. Then, install the new liner and secure it according to the bed's design.

Memory foam dog beds offer excellent support, but the liner—the protective layer between the cover and the foam—can wear out or become damaged over time. Replacing it is a simple DIY task that extends the life of your bed and keeps your dog comfortable.
In this guide, we'll walk you through the process step by step, from removing the old liner to installing a new one. We'll also share tips on choosing the right liner and avoiding common mistakes.
Why Replace the Liner?
The liner in a memory foam dog bed serves as a barrier against moisture, dirt, and wear. Over time, it can develop tears, lose its waterproofing, or simply become too worn to protect the foam. When that happens, the foam can absorb odors, stains, and even bacteria, making the bed unhygienic and less comfortable.
Replacing the liner is more cost-effective than buying a new bed, and it's a task you can do in under an hour with basic tools. Plus, it's a great opportunity to upgrade to a waterproof liner if you didn't have one before, especially if your dog is prone to accidents or loves water.
- Check the liner regularly for tears or signs of wear, especially after washing.
- If the foam smells musty or feels damp, the liner may be compromised.
What You'll Need
Before you start, gather the following: a replacement liner (make sure it's the right size), a measuring tape, scissors (if trimming is needed), and a vacuum or lint roller to clean the foam. You may also need a seam ripper if the liner is sewn into the cover, though many modern beds have zippered covers that make access easy.
When choosing a replacement liner, consider the material. PVC-coated polyester webbing, like that used in Wilderdog's waterproof gear, is durable, easy to clean, and repels moisture. However, for a bed liner, you'll want a soft, flexible material that won't rustle or irritate your dog. Look for a liner that's specifically designed for dog beds, or repurpose a waterproof mattress protector cut to size.
- Measure the interior of the bed cover, not the outer dimensions, to ensure a snug fit.
- If you're using a generic waterproof fabric, allow extra material for tucking and securing.
Step-by-Step: Replacing the Liner
Follow these steps to replace the liner in your memory foam dog bed. The process is straightforward, but attention to detail will ensure a secure fit and lasting protection.
Start by removing the bed cover and taking out the old liner and foam. Inspect the foam for any damage—if it's stained or smells, you may need to clean it or consider replacing the foam as well. Vacuum the foam to remove dust and hair.
Next, place the new liner inside the cover, making sure it lies flat. Insert the foam on top of the liner, then pull the liner up around the foam and secure it according to the bed's design—this might mean zipping, snapping, or tucking. Finally, zip the outer cover back on and fluff the bed.
- If the liner has a waterproof side, make sure that side faces the foam to protect it from moisture.
- Avoid over-tightening the liner, as this can cause wrinkles that might be uncomfortable for your dog.
Step-by-Step: Replacing the Liner
- Remove the Cover and Old Liner: Unzip or unbutton the bed cover and take out the foam. Remove the old liner and set it aside. Check the foam for any damage or odors. Checkpoint: If the foam is stained or smelly, consider cleaning it or replacing the foam before adding a new liner.
- Clean and Prepare the Foam: Vacuum the foam to remove hair and dust. If needed, spot-clean with a mild detergent and let it dry completely. Checkpoint: Ensure the foam is completely dry before installing the new liner to prevent mold and mildew.
- Install the New Liner: Place the new liner inside the cover, then insert the foam. Pull the liner up around the foam and secure it according to the bed's design—zip, snap, or tuck. Checkpoint: Make sure the liner is snug but not tight, and that the waterproof side (if any) faces the foam.
- Reassemble and Test: Zip the outer cover back on and fluff the bed. Place it in your dog's favorite spot and observe if they seem comfortable. Checkpoint: If your dog avoids the bed, check for wrinkles or an uncomfortable fit and adjust the liner.
Product Spotlight: Waterproof Gear from Wilderdog
- Plum Waterproof Collar: Our Waterproof Collar repels water, mud, and dirt while staying soft and comfortable in your hand (and on your dog). Tough enough for any adventure, they rinse off easily and stay stink-free no matter where you roam. Made of PVC coated polyester webbing. If your dog loves water or tends to get messy, this collar is a great companion to a waterproof bed liner. It rinses off easily, so you can keep your dog clean before they hop onto their freshly lined bed.
- Tie Dye Waterproof Leash + Collar Bundle: This bundle includes our waterproof collar and leash that repels water and dirt while staying super soft against skin and fur. Perfect for the water-loving pup, this stink-proof duo keeps your adventures worry-free. Made of PVC coated polyester webbing. Pairing a waterproof leash and collar with a waterproof bed liner means your dog stays dry from walk to nap. The stink-proof feature is a bonus for both your gear and your dog's bed.
Replacing the liner in your memory foam dog bed is a simple task that can significantly extend the life of the bed and keep your dog comfortable. By choosing a waterproof liner, you'll protect the foam from accidents and moisture, ensuring a clean and hygienic sleeping space. With these steps, your dog will have a fresh, cozy bed in no time.



