Specs specialist Oakley has already produced sunglasses with integrated storage, MP3 playback and detachable headphones, but now it seems that others are set to follow with hi-tech eyewear.

Calvin Klein's USB sunglasses

Upmarket clothing brand Calvin Klein has designed a pair of sunglasses with a detachable arm concealing... a 4GB USB Flash drive.

If you’re looking for a stylish - or covert - way to carry around pictures, documents or sketches of next season’s catwalk designs, then Calvin Klein’s USB sunnies will be in posh stores from October for $200 (£122/€143). ®