An American clothing company has launched a T-shirt that it says can remain odour-free for more than a month of daily wear.
HercLéon introduced the HercShirt V5.0 through a Kickstarter campaign in July. The Minneapolis-based company describes it as its most advanced smell-resistant shirt yet. Its campaign promotes a simple promise: “Travel for a day, week or month, with just one shirt that smells great, always!”
The top model costs $79 and claims to stay fresh for at least 30 days between washes. However, the campaign presents that figure as a company claim. The materials reviewed for this report do not provide published independent test results confirming a full month of odour-free daily wear.
Seven Ingredients Built Into the Fabric
HercLéon says the Max shirt contains seven odour-fighting elements. They include copper, silver, zinc, gold, volcanic ash and two proprietary ingredients that remain secret.
The company says manufacturers weave these elements into the fabric instead of applying them as a surface treatment. It argues that this approach helps the odour-control properties survive repeated wear and washing.
According to HercLéon, copper limits bacteria linked to body odour, while silver targets other microbes. Zinc aims to neutralise sharp sulphur compounds associated with heavy sweating.
The company says volcanic ash absorbs moisture and external smells through its porous structure. It describes gold as a supporting element that helps the wider system perform consistently.
HercLéon calls its material platform HercFiber. Its website says different versions can combine metals or other compounds with a base material for specific products.
The company previously released earlier HercShirt models, along with smell-resistant underwear, socks and bedding. Its website currently sells HercShirt 3.0 products made with copper-infused material.
Three Versions Offer Different Wear Claims
The V5.0 campaign offers three versions at different prices. The $39 Budget model uses one active element and promises more than three days of heavy use.
A $69 Standard version contains four active elements. HercLéon says it can remain fresh for more than 14 days without washing.
The $79 Max model uses all seven ingredients and carries the headline 30-day claim. The company also says one shirt could last longer than seven conventional T-shirts because it needs fewer wash cycles.
Men’s sizes range from small to 4XL, while women’s sizes run from small to 2XL. The first shirts will come in matte black.
HercLéon plans to add navy blue, burgundy and dark green versions later. The company expects deliveries to begin in early November 2026, although crowdfunding schedules can change before shipment.
The product targets travellers, minimalists and people hoping to reduce laundry. Its real test will come after customers use it through hot weather, heavy sweating and repeated daily wear.
