Diffuser refill · Comfort Zone

Comfort Zone Calming Diffuser Refill 6-Pack 100538643

Six months of Comfort Zone refills

Updated October 2026

Quick verdict

A value refill pack.

Strength
Six months.
Trade-off
Comfort Zone only.
Right buyer
Comfort Zone users.
Dimensions (seller)
5.63 x 3.69 x 3.56 inches; 13.44 ounces
Product weight
13.4 ounces
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Why it matters

Six 30-day refills of Comfort Zone's single-cat calming formula, for scratching, spraying and stress. They fit Comfort Zone diffusers only.

Replace one each month.

Who it's for, and who should skip it

Good fit if

  • Comfort Zone users
  • Long-term use
  • Single-cat stress

Look elsewhere if

  • Sudden behavior changes without a vet check
  • Owners expecting instant results
  • Rooms where the plug is hidden

Pros and cons

Pros

  • Six months
  • Value
  • Calming formula

Cons

  • Comfort Zone only
  • Upfront cost
  • Takes weeks

Limitations to weigh

  • Plug diffusers into the room your cat uses most.
  • Give it a few weeks; replace refills on schedule.
  • See a vet for sudden behavior changes.

Specifications

Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.

Product weight13.4 ouncesRetailer
Model number100538643Retailer
WarrantySatisfaction guaranteed. If you’re not satisfied within 90 days, call us at 800-234-2269 so we can make it right. Proof of purchase is required.Retailer
Model nameComfort Zone Cat Calming Diffuser RefillsRetailer
MaterialPaperboardRetailer
Pieces1Retailer
In the boxSix Calming Diffuser RefillsRetailer
Dimensions (seller)5.63 x 3.69 x 3.56 inches; 13.44 ouncesRetailer

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Final verdict

Six months of Comfort Zone calming.

Where to buy

Our links open this exact model's product page. Prices and stock change; check what's included before you order.

Prices change often; the button shows today's price.

Each button opens this exact model. We may earn a commission on tracked links; it never changes what we publish. Disclosure

Questions buyers ask

Do they fit FELIWAY diffusers?
No, Comfort Zone only.
How many?
Six.