It's not just the price.
Donald Trump's team are trying to cash in on the success they had with the red 'Make America Great Again' baseball caps that dominated his presidential campaign.
In celebration of St Patrick's Day (or St Patty's Day as they insist on calling it) the Trump committee have launched green 'MAGA' hats.
At US$50 (€47) the hats are double the price of the original red caps.
But that's not the main issue.
Twitter users were quick to point out that the "alternative" shamrock embroidered on the back of the hat is a four-leaf clover.
The clover has nothing to do with St Patrick's Day, or Ireland.
The shamrock is a three-leaf sprig of clover and is associated with St Patrick's Day.
The four-leaf clover is a plant, that's rarer in abundance. It's also a sugary, oat piece that's usually found in a box of Lucky Charms cereal.
Anybody see Trump's green hats for the Irish on St Patrick's Day? It features a Shamrock, oh wait, NO ITS A FOUR LEAF CLOVER!Unbelievable!— iAble (@ableraces) March 7, 2017
Hey tRump....Make America smart again. Teach them the difference between a shamrock and a four leaf clover https://t.co/pUYK4AIYyQ— sharon kavanagh (@skavoh) March 6, 2017
Trump makes a prat of himself again with green St Pat's cap featuring 4-leaf clover instead of shamrock! And who pockets the purchase price? https://t.co/qTzNu50GuU— Mike Jempson (@MediaWiseMJ) March 3, 2017