The PET78 is our pick for a catio that connects to a window. It measures 59.06 × 27.54 × 47.24 inches and weighs 51.81 lb, with pine and steel mesh, three elevated platforms and an enclosed resting room. PetsCosset says its five-door system allows flexible indoor and outdoor access, that a single unit comfortably fits one to three adult cats and that you can connect further units for two to six cats. Check the window connection details with the seller before you buy.
Why we like it
- Three platforms and a resting room give cats variety.
- Units can be connected for more space.
- Multiple doors give flexible access.
Keep in mind
The page does not explain how the window connection is made, so ask PetsCosset what you need. Check assembly time and the weight before moving it, and place it on a level surface. PetsCosset accepts returns within 30 days of delivery for unused items in the original packaging, and you pay return shipping if you change your mind.
Who it’s for
One to three adult cats, in a home where you can place the catio against a window or door. Measure your space first.
The useful details
- Size
- 59.06 × 27.54 × 47.24 inches (L × W × H)
- Weight
- 51.81 lb (23.5 kg)
- Capacity
- 1 to 3 adult cats for one unit; 2 to 6 for combined units, per PetsCosset
- Layout
- Three elevated platforms, an enclosed resting room and a five-door system
- Materials
- Pine and steel mesh with secure latches
- Use
- Outdoor and indoor
- Returns
- 30 days from delivery for unused items in original packaging; 2-year warranty stated
An enclosure you can expand
The PET78 is modular. One unit fits one to three cats, and further units connect for more climbing and lounging space.
Plan the connection
PetsCosset advertises window access, but the page does not detail it. Measure the window or door where you want to connect, and ask the seller how it works.
Our buying advice
Choose the PET78 for a catio with room to grow. The PetsCosset code from our page applies at checkout.
PetsCosset Medium Walk-In Catio Enclosure with Window Access (PET78)
A 59 inch pine and steel mesh catio with three platforms, an enclosed resting room and a five-door system for 1 to 3 cats.
Listed price checked October 17, 2026. The lower price assumes the supplied code is accepted; shipping, tax and final total are set by the seller.
8% off. Code copies when you shop. This offer is partner supplied; confirm code eligibility and the final total at checkout.
A few good questions
How many cats does it hold?
PetsCosset says one unit comfortably fits one to three adult cats.
Can I add more units?
Yes. PetsCosset says combined units suit two to six adult cats.
What is it made from?
Pine and steel mesh, with secure latches.
Product sources
Product details checked against the brand’s information on October 17, 2026.
- PetsCosset PET78 Walk-In Catio specifications (petscosset.com)
- PetsCosset returns policy (petscosset.com)
- PetsCosset public product variant data (petscosset.com)
How it compares
Best expandable catio in our best catios and outdoor cat houses
