Crazy Idea TOP Sirio

A tank top for high-elevation activities? Yes, it's possible and it's Crazy! Sirio is the tank top for your Fast & Light mountain adventures on the hottest days. More than a tank top, it's a technical t-shirt without sleeves, stretchy and airy, constructed with J2 microfibre and finished with a rapid-dry treatment. The wide shoulder straps are comfortable even with the backpack on, as is the shallow neckline, a permanent fixture on all most technical garments.