Mufflon W100 Mu-Jim Men’s Boiled Merino Wool Jacket

Natural warmth for year-round layering

The Mufflon W100 Mu-Jim Men’s Jacket is a premium layer made from 100% pure boiled merino wool. Its dense yet breathable wool fabric provides natural insulation and comfortable temperature regulation across spring, summer and autumn, while also working as a warm midlayer during colder weather.

Made in Germany and designed with a close, slim fit, the Mu-Jim combines practical outdoor performance with a clean, understated appearance suitable for travel and everyday wear.

Key features

• 100% pure boiled merino wool

• Dense W100 fabric weighing approximately 450 g/m²

• Naturally breathable and insulating

• Slim, close-fitting design

• Full-length two-way front zip

• High stand collar for additional neck coverage

• Adjustable drawstring hem

• Two zipped external pockets

• Two internal pockets

• Approximately 70 cm long in size M

• Made in Germany

Naturally insulating merino wool

The dense boiled-wool fabric helps retain warmth while allowing moisture vapour to escape. Merino wool naturally supports temperature regulation, making this jacket comfortable across a wider range of conditions than many conventional synthetic layers.

The wool’s natural properties also help resist the build-up of odours, so the jacket can often be refreshed simply by airing it between wears.

Designed for changing conditions

Wear the Mu-Jim by itself as an outer layer in cool, generally dry weather. Its streamlined fit also allows it to be worn underneath a suitable shell or heavier coat when additional weather protection or warmth is needed.

The raised collar provides extra protection around the neck, while the adjustable drawstring hem helps reduce cold air entering from below.

Four practical pockets

Two zipped front pockets provide secure storage for everyday essentials while offering a comfortable place for your hands. Two internal pockets provide additional space for items such as a phone, wallet or keys.

Slim fit and sizing

The Mu-Jim has a narrow, close-cut silhouette. If you intend to wear thicker layers underneath, check the manufacturer’s measurements carefully before selecting your size.

The approximate body length is 70 cm in size M.

Wool care instructions

Merino wool generally requires less frequent washing than synthetic fabrics. Air the jacket in a well-ventilated place after wearing and wash it only when necessary.

When washing:

• Wash individually using cold or lukewarm water

• Use a small amount of wool-appropriate detergent

• Hand wash or use a gentle wool programme

• Use a gentle spin cycle

• Reshape while damp

• Dry flat away from direct sunlight or heat

• Do not tumble dry

• Avoid placing it on a radiator

• Do not dry-clean

Important weather information

The dense boiled wool is naturally water-repellent and can handle light moisture, but the jacket is not fully waterproof. For sustained rain or severe weather, wear it underneath a suitable waterproof outer shell.