This paper discusses the development of WeBreath, a wearable system designed to monitor respiratory health for individuals with chronic respiratory diseases and sleep disorders. The project brought together experts in engineering, industrial design, and medicine, requiring an iterative process to address user needs, medical requirements, technical feasibility, and commercial constraints. Beyond describing the product, the paper examines how multidisciplinary collaboration shaped its development, highlighting challenges such as regulatory requirements, user adoption, and market readiness. It explores design challenges from a user experience perspective, balancing functionality with comfort, wearability, and usability. The paper provides insights into structuring teamwork in medtech projects, showing how user-centred design principles guided decision-making and shaped the outcome.