Based in Seattle, Sun Precautions was founded in 1992 to provide medically accepted sun protective clothing to patients and health minded consumers. Solumbra, it's proprietary sun protective clothing, is primarily made of a patented fabric to provide all-day sun protection. Solumbra fabric's UV protection has been discussed in published medical research and Solumbra has been recommended by thousands of doctors. The Solumbra fabric has been tested for up to 500 laundering and UV exposure cycles, in contrast to US industry standards that require only 40 durability cycles. Solumbra clothing has been worn by athletes at grueling ultra marathons and other athletic competitions.