The offer of receiving a pair of Bose polarised Lenses or a pair of Bose non-polarised Lenses for free with the purchase of Bose Frames Tempo, Tenor or Soprano is valid only on purchases made on Bose e-commerce websites after 8 July, or while stocks lasts. This offer may not be combined with any other offers or applied to previous purchases. £39.95 is the price under which a pair of Bose polarised Lenses are available on bose.co.uk when purchased alone. £29.95 is the price under which a pair of Bose non-polarised Lenses are available on bose.co.uk when purchased alone. In the event the Bose Frames are being returned, the Bose Lenses must also be returned before we can refund your purchase. This promotion is only available on Bose e-commerce websites.