The easiest way to achieve proper sail trim. These lightweight wool strands mount on both sides of the leech of your main, and the luff of your jib. Their orientation helps to determine when your sail is optimally trimmed for your heading. One package contains 7 red (port) and 7 green (starboard) double strand wool tell-tales with adhesive discs. They can be separated into single strands for even greater sensitivity.
Double or single strand
Relaxes...won't hold a crease
Resists hang-ups and sticking
Instructions included