The best replacement for shirts is skins.

The best alternatives to shirts are rated as following:
★★★★★  skins
★★★★  blouses
★  stormtroopers
★  tops
★  blouse
★  t shirts
  skins loiter squad
  sweaters
  shirts
  regular fit
  sweatshirts
  yellow shirts
  brooks brothers
  ironing

Your alternative for shirts is not listed? Suggest!
Speaking about shirts, one probably shouldn't forget about sleeves.

Other search terms related to shirts and their ratings are:
★★★★★ sleeves
★★★★ leather sleeves
★★★ ties
★ wrinkling
★ cufflinks
You have in mind a companion for shirts and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of shirts in all years. Click on graph for more.
shirts
skins
blouses