The Octa conforms to your waist while sitting or standing and attaches to your Maxpedition bag to go wherever you go, making it perfect for airline or train travel. Attaches to your Maxpedition bag or external pocket using two (2) 3″ TacTie® Attachment Straps (sold separately).Overall size: 10″(L) x 4.5″(W) x 6.5″(H)Main compartment: 10″(L) x 3″(W) x 6″(H)One (1) 5.5″(L) x 5″(H) zippered pocket with 2″(L) x 6″(H) external loop fieldOne (1) 6″(L) x 5.5″(H) x 1.5″(W) zippered pouchInternal 3-channel elastic organiztionOne (1) 5.5″(W) x 5″(H) internal slip pocket4x 1″ webbing loops, over 4x 2″ webbing loopsN/A