What is smaller, lighter than paracord but has almost double the breaking strength? Technora Nine-Fifty - just over 1/10 of an inch thick, but with 950-pounds in tensile strength (all right, it's 960 lbs rated, but 950 sounds cooler I guess).
Technora cord is very cool stuff - eight times stronger than steel of equivalent weight. The hank pictured above is 40 feet in length and weighs in a 1.3 ounces. A 50-foot hank of paracord weighs over twice that. Size wise, this hank of Technora takes up about 1/3 the space of a 50 foot hank of paracord. If you're familiar with bankline, it's a bit thicker than that, and obviously much stronger.
The cord is made up 16 individual strands, braided together. A single strand has a 60 pound breaking strength. The strands are not going to be as easy to work with as an intact braid, but in a pinch, you have that option.
When size and weight are at a premium, and you want something you can lift a grand piano with, Technora is your best bet. Heck, Batman probably uses this stuff in his grappling hook gun. If you've got a small kit, limited space for cordage or just need something ridiculously strong for its weight, check Nine-Fifty cord out.