Bonus features include channels on both shoulder straps (accessed via long zippers), so you can use one for hydration and the second for your radio
Interior & Linings: Luxuriously stitched, removable, washable liner is moisture-wicking
Open water allows exposed hooks
Penn Battle II Spinning Reel Penn Battle is an upgraded version of Penn Battle
Other features include a ventilated shoe compartment, a luggage pass-through, padded mesh shoulder straps and a padded back panel, and a sternum strap
While official under-seat dimensions might indicate your structured suitcase fits, keep in mind that it might be a challenge to angle it to fit into the narrow space between your seat and the one in front of you to actually get it in place