The partlet covers the area between the dress and the neck - basically covering the chest and shoulders - to varying degrees and ties under the arms.
It could be used in varying ways, either to make things more modest, or to make things veiled and enticing.
The partlet either gathers to a tight band at the neck, or lays flat with only the front two or three inches gathered to the neckband. In either case, it opens at the front, where the neckband is fastened together with laces, or hooks and eyes.
Earlier versions of the partlett include: a scapula
What is this? This is The Garbindex - a guide to making garb for recreationists (ie how to sew clothes that will make you look genuinely medieval, when 'playing' with such groups as the SCA, doing LARP - or even making something really genuine for drama.)
Use these resources to find resources that will help you create clothing that looks great - and real!