I have a flight on 8/13 to Denver CO from Jacksonville FL and I'm trying to avoid the fees for carry-ons since I'm on a tight budget. I'll only be staying for 2 days so I just want to bring my MacBook and a t-shirt/shorts. I bought a simple Case Logic laptop sleeve that fits the dimensions for the personal item. Am I able to put my MacBook in there as well as a t-shirt and a pair of gym shorts. The sleeve has metal zippers and another compartment on the outside also with a metal zipper. I would rather just take a backpack which is a little bigger than the posted dimensions on the website and squish it but I don't want problems on the day of my flight. This is my first flight ever with Frontier and my first flight in general in the past 10 years.
Any responses is greatly appreciated.