The Sunderland Arizona UV Sunwear shirt uses a revolutionary Cocona fabric to provide excellent sun protection. Made utilising natural technology derived from coconut shells, the Cocona fabric can provide up to 50 ultraviolet protection factor. With activated carbon embedded in its yarns and fibres, Cocona fabric absorbs harmful UVA and UVB radiation, and because its not a chemical treatment applied to the fabric, there are no negative effects on the skin to worry about. A long sleeve version is also available
here.