NASA, we're told, uses silver as a method of purifying water in the International Space Station. The precious metal is oligodynamic, meaning it kills 99.9 per cent of bacteria, fungi and other microbes naturally – making it ideal for incorporating into underwear as well.
Organic Basics has just launched its latest line of SilverTech boxer briefs, T-shirts, socks and towels on Kickstarter (and has already exceeded its target), winning fans for its claims that you won't need to wash them after every wear.
Made with 100 per cent recycled nylon and the Polygiene sustainable silver fabric treatment, the boxers and tees are sweat-wicking and breathable – so they keep you warm when you're cold and vice versa – and also feature vents 'in critical sweat-prone zones'. The socks are made with recycled wool and the towels with organic cotton, plus Polygiene.
Organic Basics says SilverTech 2.0 garments are made sustainably in certified, European factories, while washing them at home less often saves energy, water and greenhouse gases.
The very comfy-looking clobber starts at $29 (about £21) for a two-pair pack of socks or a pair of boxers, or $59 (around £43) for a T-shirt, if you're an early bird.