Third Eye Theatre Ensemble is offering a labor of love this weekend with its Chicago premiere production of Stitch, marketed as “An A Cappella Opera for 3 voices and 3 Sewing Machines.”

Laboring in a tattered environment closer to Wozzeck’s than to Carmen’s, there’s no reprieve for these factory workers. But the piece, directed by Rose Freeman and conducted by Alexandra Enyart, is a dancing, acting, singing tour de force for the cast of two sopranos and a mezzo. Kudos to Angela Born, Mary Lutz Govertsen, and Rena Ahmed for pulling off the high-wire act of sustained, metaphorically naked (i.e., without instrumental accompaniment) vocal performance.