With the one-shell rule gone, here are all the alternate and throwback helmets NFL teams have unveiled so far - Footballscoop
Eagles black helmets: Here's when the team will debut their new look
NFL Teams Debuting Alternate Helmets, Jerseys for the 2022 Season – NBC Los Angeles
A Deep Dive on the Eagles' Kelly Green Uniforms
Eagles Twitter Hotly Debates New Alternate Helmet Design
Eagles to bring back kelly greens as alternative uniforms in 2023 – The Morning Call
Details on when the Eagles can actually return to wearing Kelly Green uniforms
Philadelphia Eagles Will Wear All Black Helmets Vs. Packers on Sunday Night Football – NBC10 Philadelphia
Bengals, Eagles and Jets drop new alternate helmets
Eagles to debut alternate black helmet during 2022 NFL season: 'Something us players always wanted'
Philadelphia Eagles - Wikipedia
Eagles Black Alternate Helmets Dates Revealed
Eagles unveil kelly green uniforms. When will they wear them in 2023?