Bobbles are the reason so many good jumpers end up at the back of the wardrobe. The jumper is still warm, still fits and still looks lovely from a distance, but up close the sleeves and sides are covered in small balls of fluff. The good news is that most bobbly knitwear can be brought back in a few minutes. This guide covers what to look for in the best fabric shaver for jumpers, how to use one safely on wool, cashmere and acrylic, and how to slow bobbling down in the first place.
Why jumpers bobble
Bobbles, also called pilling, form when short or loose fibres work their way to the surface of the fabric and tangle together. Friction is the main cause, so they appear first where the jumper rubs: under the arms, along the sides, on the cuffs and where a bag strap sits.
Some yarns pill more than others:
- Wool and lambswool pill a little, especially in the first few wears, then usually settle down.
- Cashmere is made from very fine, soft fibres, so it is prone to pilling, particularly in looser knits.
- Acrylic and polyester blends often pill heavily, and because synthetic fibres are strong, the bobbles cling on rather than falling away.
- Cotton knits tend to pill less, but can still bobble where they rub.
Pilling is not a sign that a jumper is badly made. It is simply what happens when soft yarns rub together. Removing the bobbles regularly keeps knitwear looking new for far longer.
What makes the best fabric shaver for jumpers?
A fabric shaver works like a small electric razor. Rotating blades sit behind a perforated metal guard, and the bobbles poke through the holes and are trimmed off without the blades touching the knit itself. When you are choosing one for knitwear, look for:
- A good guard. The mesh guard is what protects the fabric. Different hole sizes suit different bobbles, from fine fuzz to larger pills.
- Steady power. A fabric shaver that slows down as the battery runs low can snag rather than cut. Rechargeable models give consistent performance without a supply of batteries.
- A comfortable shape. You will be working over a whole jumper, so it should sit easily in your hand.
- An easy-to-empty lint chamber. Bobbles are collected inside and need emptying regularly.
- Spare parts and cleaning tools. A spare blade and a brush help the shaver keep working well for years.
The Fridja f40 Fabric Shaver was designed with these points in mind. It has a built-in rechargeable battery with USB-C charging and gives up to 60 minutes of use per charge. It comes with three mesh sizes for different types of lint and pilling, weighs around 200g, and includes a USB-C cable, a spare blade and a cleaning brush. It works on knitwear, coats and upholstery too.
How to use a fabric shaver on a jumper
- Check the label. A fabric shaver is safe on most knitwear, but very loose, open or hand-knitted pieces need extra care. Our fabric care symbols guide is useful if you are unsure.
- Lay the jumper flat. Spread it on a table or ironing board, smoothing out folds. Never shave a jumper while you are wearing it.
- Hold the fabric taut. Use your free hand to keep the area flat and slightly stretched, but not pulled out of shape.
- Use light pressure. Rest the shaver on the surface and let it do the work. Pressing down is the most common cause of snags and holes.
- Move in small circles or short strokes. Work over one section at a time, then move on. Do not go over the same patch again and again.
- Empty the lint chamber often. A full chamber reduces performance. Empty it after each jumper, or more often on very bobbly pieces.
- Finish with a lint roller or brush. This picks up any loose fibres left on the surface.
For more detail on technique, see our article on how to remove bobbles from knitwear safely.
Wool, cashmere and acrylic: what to know
Wool and lambswool
Wool responds well to a fabric shaver. Use a medium guard and light passes. If a new wool jumper keeps pilling in the first weeks, a gentle shave every few wears will keep on top of it until the loose fibres are gone.
Cashmere
Cashmere needs the lightest touch. Use the finest guard, keep pressure to a minimum and work slowly. Some people prefer to use a cashmere comb on very fine knits, and a fabric shaver for heavier pilling on the sides and sleeves.
Acrylic and synthetic blends
This is where a fabric shaver really earns its place. Synthetic bobbles are firmly attached and will not brush off, so shaving is often the only way to remove them. A larger guard helps on heavy pilling. Expect to repeat it from time to time, as acrylic tends to pill again.
Chunky, cable and textured knits
Take care around cables, ribs and raised stitches. Work on the flatter areas and go gently over any texture, so you do not catch the yarn.
Common mistakes to avoid
- Pressing too hard. Light contact is all you need.
- Shaving over seams, buttons or embellishments. Steer around them.
- Using a blunt blade. If the shaver starts pulling rather than cutting, clean it and change the blade.
- Forgetting to empty the chamber. A full chamber means poorer results.
How to slow down bobbling
- Wash less often. Air jumpers between wears instead of washing after every outing.
- Turn them inside out to wash. Use a gentle wool cycle or hand wash, and a mesh laundry bag for delicate knits.
- Dry flat. Avoid the tumble dryer, which increases friction and shrinkage.
- Fold rather than hang. Store jumpers folded with a little space around them. Our guide to storing winter clothes properly has more tips.
- Refresh with steam. A gentle steam removes creases and freshens knitwear without washing. Our guide to using a steamer on knitwear explains how.
Fabric shaver or lint roller?
They do different jobs. A lint roller lifts loose surface fluff, hair and dust, but it will not remove bobbles that are attached to the fabric. A fabric shaver trims those bobbles away. Many people keep both: a roller for quick touch-ups and a shaver for a proper refresh. Our article on how well fabric shavers work looks at the results in more detail.
Give your favourite jumpers a second life
A few minutes with a fabric shaver can make a tired jumper look close to new, and it means you can keep wearing the knitwear you already love rather than replacing it. Shave gently, care for your jumpers between wears and store them well, and they will look good for many winters. You can find the f40 in our fabric shavers collection.