Can You Put Cashmere in the Dryer?

The Direct Answer: No

Do not put cashmere in a tumble dryer. The combination of heat and mechanical tumbling causes two types of damage simultaneously — shrinkage and felting. A single dryer cycle can reduce a cashmere sweater by one to two full sizes while turning the soft knit into a dense, stiff mat. This damage is permanent.

What the Dryer Does to Cashmere

Shrinkage

Cashmere fibers contract when exposed to heat. The temperatures inside a standard tumble dryer — even on a "low" setting — exceed 50°C (122°F), well above the 30°C (86°F) threshold that cashmere tolerates safely. The fibers shorten, pulling the entire garment tighter and smaller.

Felting

This is the more destructive process. Cashmere fibers have microscopic scales on their surface. Heat opens these scales, and the mechanical tumbling of the dryer pushes the fibers together. The open scales interlock like Velcro, fusing the fibers into a dense mat. Once felted, the individual fibers cannot be separated — the knit structure is destroyed.

The Combined Effect

Shrinkage alone might be partially reversible through soaking and stretching. But the dryer causes shrinkage and felting together. The felted fabric will not stretch because the fibers are locked in place. The sweater is simultaneously smaller and unable to be stretched back.

What About "Air Dry" or "No Heat" Settings?

Some dryers have an air-only or "no heat" tumble cycle. While this eliminates the heat component, the mechanical tumbling alone still poses risks:

• Friction: The sweater tumbling against the drum walls and any other items causes surface abrasion and pilling
• Stretching: The repeated lifting and dropping action can stretch the knit unevenly
• Snagging: Buttons, zippers, or hooks on other items in the dryer can catch and pull cashmere threads

Air-dry tumble is not as catastrophic as heated drying, but it is still not recommended. Flat drying takes the same amount of time and carries zero risk.

The Right Way to Dry Cashmere

Flat Drying (Standard Method)

1. After washing, roll the sweater in a clean dry towel and press firmly to remove excess water
2. Lay the sweater flat on a fresh dry towel or a mesh drying rack
3. Reshape to original dimensions — smooth shoulders, straighten seams, correct the length
4. Keep away from direct sunlight, radiators, and heat vents
5. Flip once during drying
6. Allow 12-24 hours for complete drying

This is the only drying method with zero risk to the fiber.

Speed Up Drying Safely

If 12-24 hours is too long, these methods reduce drying time without heat damage:

• Extra towel pressing: Use two or three towels in sequence to absorb more water before flat drying. The drier the sweater starts, the faster it finishes.
• Fan: Point a room fan at the sweater from a distance. Moving air accelerates evaporation without heat. Can reduce drying time to 6-8 hours.
• Dehumidifier: Run a dehumidifier in the room where the sweater is drying. Lower humidity speeds evaporation.
• Mesh drying rack: A raised mesh rack allows airflow underneath the sweater as well as on top, roughly halving the drying time compared to a towel on a table.

What If It Already Went Through the Dryer?

If a cashmere sweater accidentally went through a heated dryer cycle, assess the damage:

Condition	Diagnosis	Can It Be Fixed?
Slightly smaller, still soft	Mild shrinkage, no felting	Yes — soak and stretch method has good odds
Noticeably smaller, slightly stiffer	Moderate shrinkage with light felting	Partial recovery possible
Much smaller, dense, stiff, matted	Severe felting	No — the fiber structure is permanently changed

For the recovery method, see our unshrinking guide. For severely felted cashmere, the sweater can be repurposed as craft material but cannot be restored to its original form.

Dryer Sheets and Cashmere

Even if you are not tumble drying, do not store cashmere with dryer sheets. Dryer sheets coat fibers with a thin layer of chemical softener that builds up over time, reducing breathability and changing the texture. Cashmere does not need added softener — its natural lanolin oils are what make it soft.