The Shield's suit gives him Remarkable protection from physical attacks (sufficient to stop bullets), and Excellent protection from fire (equivalent to a burning house).
The Mighty Crusaders
Bill Higgins is the son of Joe Higgins, who as the original Shield was petrified during a case by a super-villain named the Eraser. Donning a spare Shield costume, Bill vowed to continue his father's work. Possessing no super abilities of his own, Bill relies entirely on his own brawn plus the suit's resistance to bullets and fire.
Sadly, in his private life, Bill is a total washout and at times seems cursed. Genuinely clumsy, he can't hold down a job; when his girlfriend Nancy Zenith hired him to work in her employment agency, not a soul came looking for a job and she was forced to fire him. When his father was revived by The Comet, Bill gave up super-heroing and joined the Air Force.