Glossamer Floss is an amazing stretchy cord. It stretches to 700% or seven times its original size without breaking and losing its memory. It is fine enough to pass through size 11 Japanese seed beads, 3 mm and 4 mm Swarovski Crystal Beads and Czech Glass Beads. Glossamer Floss will not crack or harden over time. It is easy to use, just tie knots to secure. This cord is an excellent choice for stretchy bracelets. Use big-eye needle and don't crimp it. Crimps may fray the cord.