Cashmere or merino wool: which one is really warmer?

When temperatures drop, a question often comes up:
should you choose merino or cashmere to really stay warm?

Both are high-quality natural materials, but they don't offer the same warmth or the same feel on the skin.
Here's a simple explanation — to help you make the right choice based on your use.

1. Merino: fine, breathable... but it's still wool

Merino wool is already an excellent material:

✔ soft (less rough than classic wool)
✔ breathable
✔ thermoregulating
✔ ideal for sports, movement, active life

But despite these qualities, merino wool:

• doesn't insulate as much as cashmere,

• is less warm at equal weight,

• and remains a more "active" fiber than a cocooning fiber.

Great for moving, less for cocooning.

2. Cashmere: one of the warmest materials... at equal weight

Cashmere is not ordinary wool:
it's the fine, insulating down of the cashmere goat.

Its advantages are incomparable:

✔ up to 3 times warmer than wool at equal weight
✔ second-skin softness
✔ lightweight warmth (no bulk, no stuffiness)
✔ very fine fiber (14–16 microns)
✔ instant comfort as soon as you put it on

➡️ Ideal for indoors, calm, slow moments.

3. At equal weight: cashmere is objectively warmer

To understand, you need to look at insulation.

Simple comparison:

Cashmere retains heat better without preventing the skin from breathing.
It creates a comfortable microclimate, while merino mainly manages perspiration.

4. For loungewear, what to choose?

To stay warm at home, in the morning or evening:

Cashmere is unbeatable.
Because it warms without excess, it's lightweight, and it enhances relaxation.

Merino is perfect for:

• hiking

• physical activities

• active days

Cashmere is perfect for:

• reading

• working from home

• getting up in the morning

• winter evenings

• evening rituals

• relaxation

5. The CÉTOILE kimono: the philosophy of "warmth without excess"

An organic cashmere kimono offers:

• the warmth of cashmere,

• without the weight of a bathrobe,

• without the overheating of fleece,

• without the roughness of wool.

It's an indoor garment designed to warm gently, not to stifle.
A calm, light embrace, perfect for winter.

Continue your discovery

About cashmere:

Organic cashmere: why such an expensive – and precious – kimono?

Understand what distinguishes exceptional cashmere and why this material remains one of the most precious in the world.

→ Read the article

Discover other materials:

• Why sleep in silk pajamas?

Discover the natural properties of mulberry silk to aid sleep.

→ Read the article

• Why choose a breathable fitted sheet?

How TENCEL™ Lyocell contributes to a cooler and more comfortable sleep environment.

→ Read the article

Our evening wear:

→ Cashmere kimono

→ Natural mulberry silk pajamas

→ TENCEL™ Lyocell bed linen