One woman Michelle Vidrine believed it promoted ideas of exclusion, tweeting: "What kind of society are we to allow people to mock @Caitlyn_Jenner on Halloween with a costume! We got some work to do on inclusion."
US costume companies have provoked outrage after unveiling a Caitlyn Jenner Halloween outfit.
Supporters of the transgender television star, formerly known as Bruce, have labelled the unisex ensemble as 'transphobic'.
The costume is similar to Jenner's look in June's Vanity Fair magazine cover story where she unveiled her feminine identity.
The $74.99 (£47.48) unisex costume consists of a wig, bodice and sash printed with the words 'Call Me Caitlyn'.
Spirit Halloween first announced plans to launch the controversial costume last week. Other online retail sites have since launched similar outfits, reports the Daily Mail.
Another costume featuring former Olympian Caitlyn in her running gear, complete with wig and sash, was featured on another website - Buy Costumes - but has since been taken down.
Caitlyn fans not amused
Fans of Caitlyn and members of the transgender community have taken to Twitter to express their outrage, calling the costume extremely insensitive and tasteless.
Others remarked that it was no better than bullying. Kellie Knapp wrote: "This is so freaking mean and cruel. Cait is courageous and beautiful and yes even a role model. How dare people."
Molly Rose added: "@SpiritHalloween making a costume out of Caitlyn Jenner and "tranny granny" is disgusting and mean-spirited. You've lost my business."