Step 9: Other variations
Once you have the hang of the basic bracelet/collar, you can add another layer of cobra stitches overlapping the first set of knots, called a king cobra stitch/doubled Solomon bar/doubled Portuguese sinnet. The amount of cord used for a king cobra is about twice as much as for the regular stitch. Both the 1/16" and 3/32" sizes work well for the bracelets and can be used alone or combined with paracord.
Glow-in-the-dark paracord is available now, found from various online vendors and on ebay, but I've not used any myself, so I couldn't say if it's any good or not, or how long it glows.