Typical after I shelled aht on a pair of -40 rated welliesI just came across this vid and thought you guys might find it interesting ..
[video=youtube;L5_f4mHboMI]http://www.youtube.com/watch?v=L5_f4mHboMI&feature=pl ayer_embedded#![/video]
You've been able to buy reflective inserts for years, even Tesco sell them.