The Festool Seat SK-CT/SYS for Dust Extractors & Systainers (item 578730) is a padded seat cushion that mounts directly to Festool jobsite equipment. This is a seat and kneeling pad designed to give you a comfortable place to sit, kneel, or take a break without having to carry a separate stool or chair onto the jobsite. It attaches to Festool Dust Extractors with a Systainer interface, standard Systainers, and the SYS-RB Cart, turning gear you're already carrying into a place to sit down.

The cushion is molded from EPP foam — the same lightweight, cold-insulating foam used in protective packaging — which means it stays comfortable on cold concrete or tile and shrugs off spills and moisture instead of soaking them up. It's water-resistant and easy to wipe clean, so it holds up to real jobsite conditions rather than being a delicate add-on you have to baby. A padded 1-in (25mm) carry strap retracts out of the way when you're not using it, and a built-in tray on top keeps screws and small parts from rolling off onto the floor while you're working close to the ground.

What sets this apart from a generic site stool is the T-LOC connection: it locks onto Festool Dust Extractors, Systainers, and the SYS-RB Cart the same way Systainers stack onto each other, so it stays attached during transport instead of sliding off the back of a truck or cart. Mount it to a SYS-RB Cart and you've got a mobile kneeling station that rolls with you instead of forcing you to drag a stool down a hallway or across a room.

This is a practical pickup for anyone who spends long stretches working low — installing baseboard, laying flooring, running low electrical or plumbing runs — or who just wants a comfortable place to sit during breaks without adding another separate tool to the truck. If you already run a Festool Dust Extractor, Systainer, or SYS-RB Cart, this seat piggybacks on gear you're bringing to the job anyway.

Your Systainer Was Already There — Now It's a Chair Too

The Festool Seat SK-CT/SYS turns gear you're already hauling into a comfortable place to sit or kneel, no extra stool required.

• Who it's for: Anyone running a Festool Dust Extractor, Systainer, or SYS-RB Cart who spends real time working low — flooring, trim, tile, or low electrical and plumbing runs.
• Why it stands out: The T-LOC connection means it doesn't just sit on top loosely — it locks in and travels with your gear, and the EPP foam actually holds up to jobsite moisture and grime.
• Worth knowing: It's a comfort accessory, not a tool — but if you've ever balanced on an overturned bucket to save your knees, you already know why this is worth having.

• What does this attach to? Any Festool Dust Extractor with a Systainer interface, a standard Systainer, or the SYS-RB Cart, all via the T-LOC connection.
• Is it safe to use outdoors or around moisture? Yes. The EPP foam is water-resistant and easy to clean, so it holds up to typical jobsite conditions.
• Can I use it as a kneeling pad instead of a seat? Yes. It's designed to work as either a seat or a kneeling pad, and it can be mounted to a SYS-RB Cart for a mobile version of either.