In this study, we examined emotional and physical aspects of chest binding by surveying 61 trans and gender non-binary (TNB) individuals who currently practice compression of mammary tissue through structural undergarments. Participants believed that binding produced better connections with and/or expression of their gender identity (92%, n=52). Through thematic analysis of qualitative responses, we found three non-mutually exclusive reasons for binding: (a) positive emotional feelings elicited by the practice, such as confidence, comfort, and safety (56%, n = 34); (b) aesthetic and visual improvements, like better fit of menswear (51%, n =31); and (c) greater satisfaction with gender expression and amelioration of dysphoria (69%, n = 42). One third of participants were ambivalent about binding, noting both positive and negative aspects. One-quarter said that binding made them feel anxious, sad, or upset, and another quarter mentioned physical difficulties like discomfort, back pain, constraint, and trouble breathing.