SLACKiES are the perfect fit for our yo-yos:?they are slightly (~15%) thicker than regular strings, measure in at 45 inch (115cm) and are especially well suited for all of your slack and suicide tricks - hence the name.
The extra thickness doesn't feel bold at all, but offers that extra bit of response for yo-yos with a larger gap (like all iYoYos - we like to maximize the gap :) ).
Comes in bundles of 50 pcs and our team's favorite green/white/yellow color mix!