Boruto, upon learning about Sasuke’s significant role as his father’s rival, expressed a desire to be Sasuke’s student. As Boruto evolved under Sasuke’s guidance, Sasuke, recognizing his disciple’s bravery and maturity, would occasionally pass on his foreheadband during pivotal moments.

In the Boruto manga, Sasuke’s forehead protector isn’t a constant accessory for Boruto; instead, he typically uses his own. However, Sasuke entrusts his foreheadband to Boruto, highlighting its significance. Sasuke, too, doesn’t regularly wear a headband, but he always carries it with him.

In Chapter 49 of the Boruto: Naruto Next Generation manga, before departing to aid Naruto against Isshiki, Sasuke noticed Boruto’s insecurity about Momoshiki taking over. To reassure his disciple, Sasuke handed over his forehead protector, symbolizing his complete faith in Boruto’s strength to overcome challenges. This act conveyed Sasuke’s commitment to stop Boruto, even if it meant taking his life, a responsibility he willingly shouldered in contrast to Naruto’s hesitation. Ultimately, Sasuke believed in Boruto’s capabilities and entrusted him with the headband, emphasizing their deep bond and mutual trust.