Hocosa wool-silk men’s undershirt – natural warmth under any shirt

An undershirt you’ll want to wear once and never go without again. This Hocosa wool-silk men’s undershirt is the essential base layer for men who value comfort, quality, and convenience. Made from 70% organic wool and 30% silk, it effortlessly regulates your body temperature – keeping you warm when it’s cold and breathing when you’re on the move. Perfect under a dress shirt or sweater, as the low neckline ensures it remains invisible.

Why you’ll want it

This undershirt is crafted with the Swiss precision Hocosa is known for. The fine, supple fabric fits your body beautifully without pinching. Thanks to its long length, it stays tucked in, meaning no more cold backs. And as our customers often say: “You hardly feel like you’re wearing it.” The seams are delicately finished, so they stay hidden under clothing. Ideal for those who want to stay warm without the bulk.

Wool-silk: the perfect combination

Organic wool provides natural insulation and temperature regulation, while silk makes the fabric softer and smoother. Together, they create a breathable blend that adapts to your body. No clammy feeling, no odors – wool is naturally self-cleaning. You rarely need to wash this undershirt, honestly! Simply airing it out or hanging it in the bathroom while you shower is usually enough.

Care & washing

Do you still want to wash it? Do so cold using a small amount of Lanalicious wool detergent. Gently reshape the undershirt after washing and lay it flat to dry. This helps it maintain its perfect fit. Pro tip: don’t wash it too often – organic wool stays at its best when you handle it as little as possible.

Fit & styling

The Hocosa undershirt features a low, round neckline that stays discreet under a shirt, polo, or sweater. Do you prefer something with a higher neck? Take a look at our wool t-shirts and longsleeves by Hocosa. The shirts are available in various colors and sizes, ensuring you’ll always find the right one.

Sustainable & ethical

Hocosa is a small family-owned business from Switzerland that works with organic, GOTS-certified wool and silk. All clothing is produced in Europe under fair conditions – without unnecessary additives, dyes, or treatments. You can feel it in everything: this underwear is pure, breathable, and made to last for years.

Personal advice

Unsure about the size or fit? Call us during business hours at 010-7954177 or email klantenservice@natur-el.nl. Or visit our store at Zwaanshals 376 in Rotterdam, where you can try on and compare the entire collection. We are happy to provide you with personal, honest advice.

FAQ – frequently asked questions about the Hocosa wool-silk men’s undershirt

What material is the undershirt made of?

The shirt is made of 70% organic wool and 30% silk. Both materials are entirely natural, breathable, and temperature-regulating.

How often should I wash it?

Almost never! Wool and silk are self-cleaning. Hanging it outside to air or in the bathroom while you shower is usually sufficient. Only wash it when truly necessary, using cold water and a bit of wool detergent.

Does it itch?

No, absolutely not. The addition of silk makes the undershirt feel soft and smooth against the skin – even for those with sensitive skin.

What is the best way to wear the undershirt?

Under your dress shirt, sweater, or jacket. The low neckline ensures it isn't visible, keeping your outer layers looking neat. Ideal for daily wear or while working outdoors in the cold.

Is it available in other styles?

Yes, Hocosa also makes wool t-shirts, longsleeves, and long johns in the same wool-silk quality. Check out the entire collection in our webshop or in our store.