Army Navy Gear's Coghlan's Multipurpose Utility Cord 4MM is a multipurpose cord that is excellent for clothesline, using as a guy line for tents, tying down items, and many other uses. Made out of polypropylene it won't rot or mildew. 

• Size: 1/8" x 66'
• Handy for use as guy lines, clotheslines, lashing, etc. 
• Strong polypropylene
• Won't rot or mildew