Work in Progress: Poison Ivy Hallowe'en Costume Ali Does It Herself Poison Ivy Happy Halloween! This year I have chosen to sew a Halloween costume inspired by Poison Ivy. I opted for a velvet fabric with corset bodice and also handmade each leaf out of velvet Carnival Costume Dress Poison Ivy Sexy Costume Adults' Women's Halloween Carnival Mardi Gras Carnival Party Dress Up Amazon.com: Rubie's womens DC Comics Superhero Style Poison Ivy Deluxe Corset Party Supplies, As Shown, Small Medium US : Health & Household Adult Poison Ivy Costume Bundle DC Villains, Green, Small Spirit Halloween Amazon.com: Lagusida Adult Poison Ivy Costume Women Sexy Green Dress (US, Alpha, X Small, Regular, Regular, Green): Clothing, Shoes & Jewelry