Crossbars feel sturdy when attached. Fabulous sandals! This is really a great system. They work well with our all black uniforms( mirrors my soul after 25 years bartending) but the style is not everyone’s favorite. I bought it for my daughter in year 6. AHORA YA SÉ QUE ESTOS DISPOSITIVOS HAY QUE COMPRARLOS EN UNA TIENDA DIRECTA, PARA HACER VALIDA LA GARANTÍA. About the quality of the sound, it can definitely be improved, but still amazing. Connection is very easy and stable. I trip all the time because my sandles are too big now. Do not order these!