Three Layers, and the Bottom One Does the Felting
Mats can be removed from a Siberian's coat without hurting him, and the workload comes from the coat's architecture: long guard hairs over a soft mid-layer over a dense undercoat built for Siberian winters. The undercoat is what felts, and it felts where the coat is longest and friction is highest: the trousers on the hind legs, the ruff framing the chest, the armpits, and behind the ears. The crisis season is the spring shed, when the winter undercoat releases in volume and dead hair left sitting in the coat weaves itself into pads within days. Test each pad with your fingers first. A loose, spongy tangle can be opened by hand; a hard, flat pad that does not shift against the skin is a different job entirely.
Staged Dematting for a Very Large, Very Patient Cat
For a Siberian, stage the work: split a pad lengthwise into ribbons with your fingers or a mat splitter while holding its base flat so the skin absorbs none of the pull, then pick each ribbon apart from its lower edge and comb the cleared ribbon fully before moving on. Cornstarch or detangling spray worked into the felt gives the triple coat's fibers enough slip to separate instead of snapping. Even a tolerant Siberian should get this in sittings of ten minutes or so, working one trouser today and the ruff tomorrow, because a big cat who decides the session is over can simply stand up and take the half-finished mat with him. End each sitting with the comb gliding somewhere, so grooming still predicts good things.
Hard Pads in a Siberian Belong Under a Guard Comb
In a Siberian, a pad that has compressed into a hard plate tight to the skin should be clipped, not picked: hours of traction on a plate that size pulls on skin across the whole area and can leave it bruised and sore. Slide a comb beneath the plate flat against the body and clip over the comb, letting the plate lift away whole. Scissors disappear into this coat's depth, and the skin folded inside a felted plate sits far closer to the surface than the outer hair suggests, which is how dematting cuts happen. Skin under a removed plate that looks red, moist, or scurfy, or a cat who flinches when the bare spot is touched, needs a veterinarian or experienced groomer to assess it before regrowth covers it again.
Surviving the Spring Shed Without a Mat Harvest
A Siberian's coat stays workable if the shedding undercoat leaves on your comb instead of in the coat: during the heavy shed, comb down to the skin every couple of days, parting the guard hairs so the comb actually reaches the layer that felts. Between sheds, a weekly full pass keeps the trousers and ruff honest. In multi-cat or multi-helper homes the sheer size of the job invites shortcuts, with everyone brushing the easy back. Listing the full Siberian comb-out, zone by zone, as a KinsLe Care Teams duty with a timestamp for each completed pass keeps the armpits and trousers from being silently skipped by every well-meaning helper in the house.