Helmet

Features

• Infrared/ultraviolet macrobinoculars
• Comlink for Slave I transmissions
• Sensors
• Broadband antenna
• Breathing mask with two hours of oxygen supply

Source: Star Wars Chronicles

Dent

The dent in Boba Fett's helmet has been explained at least twice:

• At Star Wars Celebration Orlando in 2017, an unfinished story reel for "The Clone Wars" animated series was shown. Young Boba Fett faces Cad Bane in a duel. When the two fire at one another like an old Western film, we see Boba Fett's helmet dent created by Cad's blaster fire. (Boba Fett's blaster presumably kills Cad Bane, who doesn't wear a protective helmet.)
• In "Legends," the "Enemy of the Empire" comic book showed a battle between Darth Vader and Boba Fett. In one panel, we see Darth Vader deflect blaster fire with his lightsaber and it bounces back to hit Boba Fett in the helmet, creating the dent.

Other fan theories have come up over the years, stemming from Jango Fett's helmet and how it could have been painted / passed along to Boba Fett. (This theory goes out the door when we later see in "The Clone Wars" animated series that Jango's helmet gets blown up. Maybe he has more than one?)

• In "Attack of the Clones," Jango Fett's Mandalorian helmet is in pristine condition until fighting with Obi-Wan on Kamino. After the scuffle Jango Fett's helmet has a dent on the left side (from Obi-Wan's kick or maybe the headbutt from Jango?). -- Jedi-Bird
• This dent can be clearly seen while Jango Fett is holding the helmet behind Count Dooku on Geonosis. Even after Boba repaints his father's helmet green, the dent remains (as seen in ROTJ). This is also reflected in the new action figures. No dent in the Jango Fett- Kamino Escape but dent present in Jango Fett- Final Duel. -- Jedi-Bird
• One of the news things up right now mentions the dent in Jango's helmet which appears only after Kamino. Well, I assume it happens when he hits his head as he goes up Slave I's ramp in homage to the accidental stormtrooper head-bump in A New Hope (something I noticed at the theater and confirmed by a recent homing beacon from starwars.com). -- Joe
• Jango gets the dent while boarding Slave 1- the ship's door closes and bumps him on the head (you can hear the "clank!" noise it makes when it hits him), and while some debate that he actually hit his head (despite the obvious sound effect evidence), his helmet does not have the dent when he is climbing back up the edge of the landing pad, and yet it is there on Geonosis, so that has to be why the dent is there. -- Quest
• The dent in the Kamino battle with Obi-Wan is actually on the top right hand side in the middle, not towards the front like Boba's. The dent occurs when Jango lands on his head over the edge right before he pulls Obi-Wan down with him. The dent which we are supposed to be believe is the same dent as Boba's is the one Jango sustains on Geonosis after being hit and run over by the Reek. This dent is in about the right spot as Boba's on the left towards the front and we can only believe that Boba keeps the dent to honor his father Jango who fell to Mace Windu. -- Zartan Fett

Jaig Eyes

According to the "Star Wars Chronicles," the first prototype helmet had eyelike markings on the top per production illustrations.

Influences

The helmet's t-shaped visor is based upon a barbute ("barbuta" in Italian), which is a visorless battle helmet from the 15th-century. It is an Italian design with a "T" or "Y" shaped opening for the mouth and eyes.