
The purpose of ailettes is a matter of disagreement amongst scholars. Some, such as Charles ffoulkes, claim that they enhanced protection to the neck, while others, like Ewart Oakeshott, argue that they were used primarily for decorative and heraldic reasons.
Ailettes, made both from plywood or cuir bouilli, have been successfully used in the SCA field combat to protect shoulders. Since cuir-bouilli is fairly impervious against sword blows, it is reasonable to assume they have given at least some protection to shoulders.
