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Functional underwear
for optimal sports performance

Functional underwear is an essential companion for anyone who values comfort and breathability during sports or outdoor activities.
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Eine Frau sitzt auf einem Stuhl und zieht sich Skisocken an; daneben stehen auf einem Holzboden Skischuhe und Skier.
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        A man wearing the NAKED Optics Men's Thermal Underwear (100% Merino) stands barefoot in a dark long-sleeve top and matching leggings, facing away against a plain white background, highlighting the sleek fit of this seamless merino functional underwear.A man stands barefoot against a white background, wearing matching dark long-sleeve thermal top and bottoms. The NAKED Optics Men's Thermal Underwear (100% Merino) set delivers exceptional comfort and warmth, making it perfect for everyday use or as high-performance merino wool functional underwear for outdoor adventures.
        Merino Functional Underwear
        Thermal Underwear Men (100% Merino)
        2 Pants Lengths + 4 Sizes
        CHF 84.90
        A woman stands barefoot, facing away, on a white background, wearing a black long-sleeve top and cropped leggings. This stylish set is the Women's Thermal Underwear (100% Merino) by NAKED Optics, expertly crafted from soft Merino wool for exceptional comfort and breathability as premium women's functional underwear.A woman wearing the NAKED Optics Women's Thermal Underwear (100% Merino) long-sleeve black top and matching cropped leggings, standing barefoot on a white background.
        Merino Functional Underwear
        Thermal Underwear Women (100% Merino)
        2 Pants Lengths + 4 Sizes
        CHF 84.90
        Man wearing black NAKED Optics boxer briefs with a grey branded waistband.Black NAKED Optics Boxer Briefs - 2 Pack with a logo-patterned elastic waistband.
        Functional Underwear
        Boxer Briefs - 2 Pack
        2 Colors + 4 Sizes
        CHF 14.90
        New Product
        A man in The SHORE Boardshorts by NAKED Optics, crafted from 4-way stretch material, holds sunglasses by a pool with a life preserver and lush plants in the background—perfect for relaxing or gearing up to surf.The SHORE Boardshorts by NAKED Optics feature a black top with a vibrant gradient design in purple, pink, and orange. Made from flexible 4-way stretch material for optimal comfort while surfing, they are finished with the signature NAKED label on the left leg.
        Functional Underwear
        The SHORE Boardshorts
        2 Colors + 6 Sizes
        CHF 49.90

        What is functional underwear and how does it work?

        Functional underwear is specially designed base layer clothing made from technical materials that perfectly adapt to the needs of active people. Our functional underwear for women and men supports the body's temperature regulation, effectively wicks away moisture, and ensures you feel completely comfortable even during intense activity – no matter the weather.

        Ein Mann steht am Fenster und zieht sich gerade seine Merino-Skiunterwäsche an; Credits: Michi Dullnig

        Functional Underwear for an Active Lifestyle

        For anyone who exercises regularly or is often on the move in everyday life, functional underwear for men and women is a smart investment. Especially during the colder months, it protects against cooling down without compromising on comfort. Whether you're running, cycling, skiing, or simply active throughout the day – functional underwear ensures that sweat is drawn away from the skin and evaporates quickly. This keeps your body dry and prevents it from getting cold. Especially in changing temperatures or during intense physical activity, the right functional underwear makes a real difference.

        4 Boxershorts liegen übereinander. Sie sind abwechselnd grau und schwarz. Der elastische Bund ist mit einem NAKED Logo bedruckt.

        Iconic Boxer Shorts for Active Days

        These sporty boxer shorts combine style and function: the soft Soft Touch cotton fabric makes them the perfect functional underwear for sports and everyday life. And with the iconic logo on the elastic waistband, you wear the NAKED lifestyle directly on your skin.

        Ein Mann sitzt an einem Pool und hät die Beine ins Wasser. Er tägt auffällig designte Boardshorts; Credits: Elias Neier

        Functional Boardshorts

        Of course, summer also calls for the right functional clothing. NAKED Optics boardshorts combine style with functionality. Eye-catching designs meet 4-way stretch, a secure waistband, and a practical hook-and-loop pocket with an additional safety loop.

        Frequently asked questions about functional underwear

        Here you’ll find answers to frequently asked questions about functional underwear.

        What makes functional underwear different from regular underwear?

        Functional underwear is made from materials that actively wick sweat away from the skin and regulate body temperature. Traditional cotton underwear retains moisture, which can lead to discomfort and rapid cooling. Functional underwear, on the other hand, keeps you dry and ensures a pleasant climate against the skin – even during intense physical activity.

        Can you wear functional underwear in everyday life?

        Many functional underwear models are so comfortable that they’re perfect for everyday wear – for example, as an extra layer on cool days or simply when you value a dry and comfortable feeling throughout the day.

        Is functional underwear only suitable for winter?

        In winter, functional underwear keeps you especially warm, while in summer, it helps cool you down. The materials regulate temperature and wick away sweat – so you stay comfortably dry in every season.

        ACCESSORIES
        A man in a white shirt and grey Cap 5-Panel from NAKED Optics looks to the left while standing against a plain light background.Grey Cap 5-Panel from NAKED Optics, featuring a bold “NAKED” text displayed on a brown patch at the front. This cotton Cap is part of the signature NAKED Optics Caps collection.
        Beanies/Caps
        Cap 5-Panel
        2 Colors
        CHF 24.90
        New Product
        Two people stand side by side wearing the NAKED Optics long-sleeve Shirt - Apres, crafted from organic cotton and featuring bold black graphic prints on the front as well as a striking Party Back Print.The long-sleeve Shirt - Apres by NAKED Optics is a white sweatshirt made from organic cotton, featuring a small minimalist drawing of a coffee cup and a sandwich on the left chest area.
        T-Shirts
        Long Sleeve Shirt - Après
        5 Sizes
        CHF 29.90
        A woman with long blonde hair, wearing The ICON by NAKED Optics—featuring UV400 protection and a metal frame—paired with a black turtleneck, looks to the side.Hexagonal sunglasses “The ICON” by NAKED Optics with a black metal frame and brown-blue gradient lenses, front view. With UV400 protection for optimum protection of your eyes.
        Polarised Sunglasses
        The ICON
        2 Colors
        CHF 39.90