Wool Felt Beret: How It Is Made, How It Should Fit, How to Keep Its Shape

A felt beret hat is not a knitted beret in a different fabric. Most people meet the beret as a knitted object — a circle of ribbing and stocking stitch that flops pleasantly and stretches over anything. The wool felt version is a different garment that happens to share a silhouette. It is one continuous matted sheet with no stitches in it anywhere, and almost everything odd about how it wears follows from that.

What makes felt hold a shape

Wool fibres are covered in microscopic scales. Agitate them wet, warm and slippery with soap, and the scales ratchet past each other and lock. Nothing unlocks them. The result is a fabric with no loops, no grain and no ability to stretch back — which sounds like a disadvantage until you want something to stay domed on top of a head all day.

That is why a felt beret holds its crown flat and its band circular while a knitted one sags by the afternoon. It is also why a felt beret that has been stretched stays stretched. The same mechanism is what you are exploiting when you shrink a jumper on purpose in how to felt a wool sweater, and the numbers behind it are in wool shrinkage when felting.

How one is actually made

There are two routes, and they produce noticeably different hats.

Blocked from a hood

Industrially, wool is felted into a cone — a hood, or capeline if it is brim-sized — which is then steamed and pulled down over a wooden block until it takes the shape. The crown is stretched over a disc, the band is drawn in, and the whole thing is stiffened and dried hard.

This is how most berets you can buy are made, and it is why they are so uniform. The blanks themselves are a purchasable thing if you want to shape your own — see felt hat blanks.

Wet felted seamlessly over a resist

By hand, you lay wool tops in crossed layers around a flat circular resist, felt through the wool by hand, cut an opening for the head and full the piece until it is dense, shaping as it shrinks. There are no seams because there was never more than one piece. The method is the same one used for bowls and hats generally — wet felting a hat walks through it, and resist felting explains the resist itself.

Hand-felted berets are usually softer and slightly irregular, and they drape rather than sit. Which of the two you prefer is genuinely a matter of taste.

Judging a good one

• Density, not thickness. Pinch the crown. Good felt is firm and springs back; poor felt compresses like a sponge and stays compressed. A thick, soft beret will pill and go shapeless within a season.
• An even edge at the band. The headband is where blocking strain concentrates. Waves or thin patches there mean it was pulled onto the block hard to hide an undersized hood.
• Surface with no visible fibre ends. Loose fibre standing proud means the felt was never fully fulled, and it will fuzz.
• Actual wool. Much "felt" sold cheaply is acrylic or a blend, which cannot be reblocked because it never felted in the first place — it was needle-punched. A snipped fibre from a seam allowance settles it; the felt hat burn test describes how.

Fibre, and whether it will itch

Beret felt runs from coarse to very fine. Coarse wool gives a hard, weatherproof, slightly scratchy hat that lasts decades. Merino gives something soft enough to wear against the forehead that is correspondingly less hard-wearing. Most good berets sit between the two, and the crown is often finer than the band.

If you have reacted to wool hats before, the culprit is usually fibre diameter rather than wool as such — is merino wool itchy covers why, and merino wool for felting covers how it behaves when you felt it yourself.

Sizing, which is less forgiving than knitting

Measure around your head just above the ears and buy to that number. Felt will give perhaps a centimetre over a season and no more, so the usual instinct — size down and let it stretch — produces a hat that grips.

Where felt is unusually good is that a slightly large one can be shrunk deliberately: damp the band, work it between your hands in warm soapy water, and it will tighten a size. You cannot go the other way, so err large.

Wearing it so the crown behaves

The band should sit level, low on the forehead, with the fullness pushed to one side rather than allowed to sit centred and puffy. A felt beret is heavier than a knitted one, so if the band is loose, the crown's own weight drags it backwards over the course of an hour. That single fact accounts for most berets that "will not stay on".

Colour is worth a thought too, because dense felt reads darker than the same dye on a knitted fabric — felt hat colours goes into it, and the styles it sits alongside are in types of felt hats and felt hats for men.

Reblocking a beret that has gone soft

This is the one real advantage felt has over knitting: the shape is recoverable, because you can re-wet the fibres and dry them into a new position.

1. Damp the hat evenly with cool water — a spray bottle, not a soak.
2. Find something the size of the finished crown. A dinner plate or a round cake tin is the traditional improvisation.
3. Stretch the crown flat over it, easing the band into a circle by hand.
4. Let it dry completely before you move it. Hours, not minutes, and away from direct heat, which makes felt brittle.

Work the band in warm water first if it has stretched, and only then block the crown. For marks and general upkeep between blockings, how to clean a felt hat covers the brushing and spot cleaning, and protecting wool from moths covers the risk that does the real damage in summer storage.

Storing one so it survives the summer

Felt has two enemies in a cupboard, and neither is dust. The first is compression: left under anything, felt takes a crease and the crease stays, because there is no elastic structure to pull it back. Store a beret crown-up on a shelf, or loosely stuffed with acid-free tissue, never folded into a drawer.

The second is moths, which are far more interested in a clean wool hat than most people expect and will take the crown from underneath where nothing shows until autumn. A sealed box or bag is the whole answer — see protecting wool from moths.

Making your own

A beret is genuinely one of the better first wet felted garments: it is small, it is round, there is no fitting to speak of, and if it comes out tight it fits someone else. Start from wet felting for beginners for the fibre handling, then follow the resist method. Expect to lose about a third of your laid-out diameter to shrinkage, and lay out accordingly.

The fabric you are making is the same material described in wool felt fabric — the only difference is that you are making it in the shape of the finished object rather than cutting it from a sheet.