If you are looking for aquatic-themed cosmetics, the Divers! Skin Pack on the Minecraft Marketplace is the primary choice for "diver" skins. Developed by LinsCraft. Key Features: Total Skins: Includes 17 themed skins in total.
Available on Steam and other PC retailers like Buka . Contents: Commando Uniform: A cosmetic helmet, armor, and cape. Com Divers Skin Pack
This is a common "commando-style" pack associated with the Helldivers franchise. It was originally released as a paid DLC for the first HELLDIVERS game and is often included in the Digital Deluxe Edition. If you are looking for aquatic-themed cosmetics, the Divers
Often includes 2 free skins for players to try before purchasing the full pack. Com Divers Skin Pack
This will help in providing specific installation instructions or a more detailed list of contents.