Never seen one in the flesh. Aren't these just big, tough rubber bands; sort like sections of inner tube?

What are their survival uses?

Yep, just cut them from an inner tube - different size tubes make for different sized bands

Gear organizers

Ranger Bands are great gear organizers, esp for paracord, twine, zip-ties, etc.

Somewhere I saw a custom knife-maker that supplies ‘em as additional security for a belt knife – a great idea that I have stolen for my Grohmann.
Just place a RB around the sheath & thread the knife lanyard knot through the RB.
Additional retention but still easy to draw out the knife when you need it.

I plan to try RB with paracord to adapt a kydex neck sheath to belt carry – could be either vertical or horizontal carry.

Motorcycle tubes also great if you want larger diameter RB.

Boy I was so far off the mark, I thought the Army Rangers had some sort of musical group of which I was unaware...Never mind...

Izzy,

Great tip. Thanks.

brings up a good question: anybody know how they came to be called ranger bands??

?Used by Army Rangers?

"Pig-Monkey" has several well-photographed descriptions of how he uses bicycle inner tubes on Bic lighters and certain knife handles. He credits videos from Dave Canterbury (http://bit.ly/ALzv6) and Dusty (http://bit.ly/8Xbnhz).

Rubberized Bic Lighter:
http://bit.ly/5XRcJ8

Rubberized Mora Handle:
http://bit.ly/7U1yrZ

Mora sheath modifications - firesteel holder:
http://bit.ly/7fCjuZ

I first heard of them from Ranger Rick ( survivaloutdoorskills.com ) but it looks like its the name of a product http://www.specialforces.com/store/catalog/product_27376_Ranger_Bands.html