Monday 10 August 2026 — London
Trends

The fleece has gone formal

It started as a hiking layer and a dad joke. It is now being cut in wool, sold at four figures, and worn under tailoring.

The fleece has gone formal
A wool-faced fleece worn under an unstructured jacket. Photograph: Ines Marchetti

Nothing in the last five years has climbed the social ladder faster than the fleece. It arrived as technical kit, was adopted ironically, then sincerely, and has now been re-cut in merino, alpaca and boiled wool by houses that would not have acknowledged its existence in 2018. The four-figure fleece is real and, more surprisingly, it makes sense.

Why it works under a jacket

The reason is structural. A fleece is warm at very low weight and compresses without wrinkling, which is exactly what a mid-layer under tailoring needs to do and exactly what a knitted jumper does badly. Wool-faced versions solve the one real objection — that synthetic pile looks cheap up close and pills within a season.

A boiled wool fleece jacket photographed flat
Boiled wool: the pile survives, the pilling does not.

The synthetic versions have not gone away and should not. A recycled polyester fleece at £60 is warm, hard-wearing and genuinely useful. What it is not is neat: the pile flattens where a bag strap sits and never recovers, and after two winters the shoulders will tell everyone exactly how you carry things. That is fine on a hill and less fine under a jacket.

“We spent twenty years telling people fleece was for the weekend. They stopped listening and they were right.”

A menswear buying director

The washing problem

Synthetic fleece sheds microfibres heavily in the wash — it is one of the worst offenders in a domestic machine. Wash it cold, wash it rarely, use a filter bag, and it sheds dramatically less. Wool-faced versions shed almost nothing, which is a genuine advantage and one that almost no label is currently making the case for.

The care question also decides longevity. Every fleece we saw that still looked good after three years had been washed fewer than ten times, air-dried flat and never tumbled. Heat is what kills the pile, in wool and synthetic alike, and a tumble dryer will age a good fleece by a year in a single cycle.

Folded fleeces in muted colours stacked on a shelf
Heat kills the pile. One tumble cycle ages a fleece by about a year.

What it replaced

The interesting casualty here is the mid-weight knitted jumper, which has been the default second layer in British wardrobes for roughly a century. Three buyers described the same pattern: fleece up, lambswool crew necks flat or down, and almost all the growth in knitwear concentrated at the heavier, more decorative end. The everyday jumper is being squeezed from both sides at once.

It makes sense on the numbers. A fleece is warmer per gram, dries faster, does not shrink, does not moth, and survives a washing machine that would felt a wool crew in a single cycle. What it lacks is the ability to look considered, which is precisely the gap the wool-faced versions are being made to fill. Whether they succeed will decide whether this is a real shift or a five-year excursion.

One caution about the wool versions. Several are constructed with a synthetic backing or a bonded membrane that is invisible from the face and undoes most of the environmental argument being made for them. If the claim matters to you, check the composition label rather than the description, and be suspicious of anything that advertises the fibre on the outside without stating what is behind it.

There is also a pilling question that separates the good synthetic fleeces from the rest, and it is decided at the finishing stage rather than in the fibre. A pile that has been properly sheared and set will shed a little in the first two washes and then stabilise; one that has been finished quickly keeps releasing fibre for the life of the garment, which is both why it looks tired quickly and why it contributes disproportionately to microfibre load. Two of the three technologists we asked said the same thing: if it sheds visibly on your hand in the shop, it will keep doing that for years.

Buy the expensive one only if it is wool and only if you will wear it under something. For everything else, the sixty-pound version does the same job, and losing it on a train will not ruin your month.