Permanent Knot Option for Tzitzit-Strings of Arba Kanfot, Tallit Katan, and Tallit Gadol
Kesher shel Kayama (קשר של קיימא) Option for Tzitzis-Strings of Arba Kanfos, Tallis Katan, and Tallis Gadol
Advantage of adding the Permanent Knot (or Kesher shel Kayama) option to your Tallit.
Kesher shel Kayama: Permanent Knot
This feature adds a tip of glue on the knots (on the four corners) to prevent from opening during wash and use.
(Not guaranteed.)