ultralight ultrastrong rope

50 feet Clothes Line on Blue Kite String
Handle ( 500# Jerry Brown Hollow Spectra
(100 yards) fishing line (for use as heavy duty
rope). 50 feet weighs ½ ounce. A plastic Blue
Kite String weighs ½ ounce too. This rope has
500 pounds of strength. They also sell a 1000
pound strength rope too.

http://www.reelproshop.com/product_info.php?products_id=77

"Spectra® to Spectra® and Spectra® to Mono No-Knots – No Loss of Line Strength No Albright or Bimini Twist knots like other Spectra® lines

Truly Hollow allowing for "Chinese Finger Cuff" Splices Nearly Un-noticeable in Rod Guides and across Guide Rollers

Ultra-Fine fiber means Silky Smooth Strength Your eyes can tell, your hands will appreciate the difference"

I use this as my guylines, clothes line, spare shoe laces.

It ties really well and is not that hard to untie. If you create a bowline with it, it will not slip, but you can also untie it too.

They have 200 lb and 300 lb strength too. They used to carry their 1000 lb strength but no longer.

What's nice is you can tie the string super, super tight between two trees covering a considerable distance and everybody in the group can use that clothes line and the weight of the wet clothes will not sag to the ground and you don't have to worry about the line breaking. (There is no stretch to the line either.)

This is used primarily for deep sea fishing.

Your wallet will be a lot lighter afterwards too.

That's what I use for the adjustable ridge-line in my hammock- the 2.2mm silver. For suspension, a lot of us hammockers use webbing tree-straps, the 7/64' or 1/8' diameter Amsteel-Blue, and a marlin-spike hitch

http://www.reddenmarine.com/site/new-search.cfm?action=search&department=0&category=992&brand=0&counter=0&letter=0&subcategory=5313&text=amsteel

it's really inexpensive and SUPER strong

I bought 1/16" spectra cord on eBay and use it for pretty much everything. I got 500 feet for about $20 and it weighs about a gram/meter.

yeah! 180' of the ZipIT Line is like $20, so it's relatively cheep stuff

takes knots very well :D