This methodology comes from the lineage of BKS Iyengar. It uses props, like blankets, cushions, cork bricks and cloth or elastic bands to mitigate chronic stresses within the body and facilitate the release of deeply-held tensions. Postures are held passively and comfortably for extended periods and include simple forward bends, supported backbends and inversions, gentle twists and more.
The student is better able to focus within and breathe in his/her natural rhythm. It induces a calm, restorative state of mind.
See Iyengar Yoga.