UPDATE: PacSun is responding to customer complaints about the T-shirt.

"As a retailer grounded in youth culture, PacSun values artistic and creative expression through the brands that we sell in our stores," the company said in a statement to E! News. "Out of respect for those who have put their lives on the line for our country, we have decided to stop selling the licensed flag t-shirt and are removing it from our stores and website immediately. We thank the men and women in uniform for their extraordinary service."

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PacSun is not feeling the love this Memorial Day weekend.

The popular clothing store is facing some backlash from several customers after a shopper spotted a T-shirt for sale that featured an upside-down American flag.

"I saw this at your location at Tanger Outlets this morning in Foley, Alabama," shopper Rachel Zawacki-Kuss wrote on the company's Facebook page. "I understand freedom of speech but this shirt, displayed prominently at the entrance of your store, for Memorial Day weekend is more distasteful and disrespectful than anything I thought I'd see."

She added, "I will not be shopping at PacSun again." In less than two days, the original photo has been shared more than 6,000 times and has received support from many shoppers.