This paper presents Noisy Flesh, an e-textile musical interface designed to control sound through body movement in performance. Unlike traditional wearable interfaces that function as garments, this work reimagines the textile interface as a prosthetic extension that augments the performer's body. The paper discusses both the design of the interface and its sonification method, emphasising how the flexibility of e-textiles can transform bodily movement and shape interactive experiences. This work explores the potential of e-textile interfaces to challenge conventional notions of wearability and embodiment in performance.