2019, 2099 and 5011 difference
5011 item: fit for 15.6inch laptop, back strap for inserting for suitcase per photos, two pockets, no card slots, glasses slots
2099item:fit for 14 inchlaptop, back strap for inserting for suitcase per photos, and inside compartment with a card slots, pen slot and glasses case pocket
2019item: fit for 14inch laptop, only two big pockets without card slots, pen slots
2019 item
5011item
2099item