To practice Setu Bandha Sarvangasana with the box, you would typically place the box under your pelvis and sacrum (the triangular bone at the base of your spine) while in Bridge Pose.

The box supports your lower back and hips, helping you maintain the lift in your hips without straining your lower back. This added support allows you to hold the pose for longer durations and experience a deeper stretch.

By using the Setu Bandha Sarvangasana Box, you can focus on the alignment of your shoulders, upper arms, and chest while ensuring that your lower back is adequately supported.

It's particularly helpful for beginners or individuals with lower back issues, as it reduces the risk of overextension and discomfort in the lumbar region.

The box can also be adjusted to different heights or angles to accommodate different body types and levels of flexibility, making it a versatile prop for practitioners of varying abilities.