Erect
Slip the ring over the penis. Draw the loop over the testicles, and attach the band to an adhesive pad on the lower back.

A few moments, erect or flaccid. Once it is on, it should feel comfortable and nearly unnoticeable. Written steps are on the instructions page.
Slip the ring over the penis. Draw the loop over the testicles, and attach the band to an adhesive pad on the lower back.
Unlike a regular ring, Xialla can go on before an erection. It helps both achieve and maintain one.