The term 'satchel feature' refers to a STRAP, which is a type of fastening device used to secure items. Straps are typically made of fabric or leather and are used to hold items such as bags, backpacks, purses, and other items in place. Straps can also be used to attach items to a person's body, such as a belt or shoulder STRAP. Straps are an essential feature of many types of satchels, providing both security and convenience.