APR

Appearances (known as suits in The Sims 1) collect together bindings and attribute them with a preview thumbnail.

Appearances follow the following format:
 * Version - A 4-byte unsigned integer specifying the version of this appearance file; should be equal to 1
 * Thumbnail/File ID - A 4-byte unsigned integer specifying the File ID of the thumbnail of this appearance; should be 0 if a thumbnail is not specified
 * Thumbnail/Type ID - A 4-byte unsigned integer specifying the Type ID of this asset; should be 14 for PNG (not compressed with Persist/RefPack) if a thumbnail is specified, 0 otherwise
 * Binding count - A 4-byte unsigned integer specifying the number of bindings used for this appearance

For each binding:
 * File ID - A 4-byte unsigned integer specifying the File ID of this binding
 * Type ID - A 4-byte unsigned integer specifying the Type ID of this asset; should be 11 for Binding