They're not a substitute for a beacon, patrollers use them in body searches. Also please don't buy the reflectors alone which you have to fasten to you outerwear yourself, because the last thing we need is rouge recco reflectors littering the backcountry.
My UK/EURO BST Thread - http://www.newschoolers.com/ns/cult/forumthread/thread_id/743385/
Check my blog for updates and reviews: http://aslansskiblog.blogspot.co.uk/
Joey -Formerly *III.JVD.III*
I post from mobile the majority of the time, so if the above is incomprehensible, I apologize.