The Unspotted Looper has a forewing length of about .75 inch. The forewing is pinkish or lavender with bands of dark gray or brown shading along wavy Antemedial and Postmedial lines. The subterminal area is light brown. The hindwings are tan with darker brown veins. The face and thorax are orange-brown. The legs are yellow with fuzzy, tan-colored scales on the femurs. The caterpillar is green with 4 wavy white stripes above the spiracles. The head is green, shiny and unmarked. There are no vestigial prolegs on the 3rd and 4th abdominal segments. It grows to 1.5 inches.