i'll help you out then...
The three biggest trends in hockey jerseys in 2010, when the powder jersey came out, were:
Fauxbacks
Roundel logos
Double-blue
The Panthers had no legitimate connection to any of the three but jumped on it anyway. Add in the weird JetBlue thing and yeah.
This sweater uses their popular palm tree logo, their 90s template, and their original colours + powder blue. The effect is tropical instead of dull and lifeless. Even if it's being overrated it's no surprise that it's popular considering current fashion