Attachments and additional features always add more to the overall efficiency of the backpack vacuum cleaners. The majority of the units have added extension wands, crevice tools, and powered brushes. Many of the vacuum manufacturers offer sweetening deals. These companies add extra features such as blower function. Moreover, the companies add multi-staged HEPA filtration systems as well. The strap design does not form an additional feature. Although in terms of backpack vacuums, the strap design does form an additional specification.
Additionally, these straps and harness styles also come in many different designs. These may add different paddings that range from very thin to heavily padded pillow-like thick. The quality of the harness can also make or break the user experience. Some manufacturers also claim that their staps are more comfortable to use.