How to use Minecraft Aphmau's mysterious secret skin ?

Learn how to download and apply the Aphmau's mysterious secret skin for Minecraft on PC (Java Edition) or Pocket Edition (PE).
PC (Java Edition):

1. Go to the Minecraft website and login to your account.
2. Click the “Minecraft Java Edition” dropdown menu and select “change skin”.
3. On the next page, click “select file” and upload the Aphmau's mysterious secret skin file.

1. Open the game app and press the “dressing room” button on the main menu screen.
2. Press “Edit Character” -> “owned skins” -> “choose new skin” and upload the Aphmau's mysterious secret skin file.

Does this skin have thick or skinny arms?

This particular Aphmau's mysterious secret skin has thick (4px) arms. It is based on the classic Steve model.

What color is this Aphmau's mysterious secret skin skin?

This particular Minecraft Aphmau's mysterious secret skin has the following color palette:
Cod Gray
Sail
Tory Blue
Tropical Blue
Atomic Tangerine