It uses a TankLock style mounting system but on a tail bag.
Includes both the bag and the mounting plat that straps to your seat.
Bag has large center compartment big enough for a full face helmet.
On right side is a slim zippered pocket.
On left side is another zippered pocket but with a liner that can expand halfway into main compartment, so you can use it to have 2 separate spaces within main compartment.
On back side is a zippered pound with a form pad for you to have some cushion if you lean back against the bag as a backrest. Or can remove pad and use for additional space
Under that is a neon green rain cover that tuck away in another zippered section.
This bag runs $185 on RevZilla and that base is another $35 but is not in stock anymore
Here's the RevZilla link if you want to see all the features,
https://www.revzilla.com/motorcycle/givi-ea146-taillock-23l-tail-bag?utm_medium=cpc&utm_source=google&utm_campaign=PLA-Accessories-Products-Test&utm_term=go_cmp-22805146765_adg-181298547766_ad-764324098778_aud-2256996096380%3Apla-2266896355103_dev-m_ext-_prd-10375394_mca-2934692_sig-Cj0KCQiA9OnJBhD-ARIsAPV51xMs39_jVn8YBhWj-Xvhfb2U0CKer_v1o5lBlq4U48wIFaxevkJpGM4aAik3EALw_wcB&gad_source=1&gad_campaignid=22805146765&gbraid=0AAAAAD8sxeygvERvXDDnOayn32_B9pyso&gclid=Cj0KCQiA9OnJBhD-ARIsAPV51xMs39_jVn8YBhWj-Xvhfb2U0CKer_v1o5lBlq4U48wIFaxevkJpGM4aAik3EALw_wcB&sku_id=10375394