This master thesis has been conducted at the Rehab Technology IIT-INAIL Lab of the Fondazione Istituto Italiano di Tecnologia in Genoa, in the context of the FeatherExo project. Its goal is to define a soft-exosuit with possible applications both in rehabilitation fields, in the case of individuals recovering from motor impairments, and as an assistive tool for older or physically disabled users. The object of interest of this study is the Feather actuator, a novel device whose performance and limitations have been investigated in order to enhance its integration in wearable robotic systems. The aim of this thesis is to provide experimental and analytical insight into the actuator behavior, enhancing the technology foundation of the project and helping in its development.