Nice to mik you a key secured but easy to remove mik mounting that locks to the rack. Water repellent fabric and deep easy to access main and side pockets the transit mik trunk bag is perfect for urban commuting and light touring. Mik the mik mounting is key rack system is a revolutionary key installed rack system that locks your bag to your bike rack making it hard for thieves to steal but easy for you to remove. Features key secured quick release mik system attaches and removes with ease durable fabric with water repellent coating deep roll top storage built in laptop sleeve water bottle and e bike battery holder to use with mik compatible racks compatible e bikes entour e daily tour e explore e anytour e fastroad e amiti e thrive e specifications material water repellent fabric colors blue gray size 301740cm weight 1400g volume 30l