Hatha yoga incorporates asana (postures) and breathing.
Sun salutations form a 'flow' portion of the class, followed by long hold or static poses to increase flexibility, strength and calm the mind.
Lovely stretching.
Guided Shavasana.
Suitable for all levels.

Yin Yoga incorporates long hold stretches (from 3-5 minutes per pose) with deep physical and mental release. Yoga Nidra is a guided meditative 'sleep'from where you can observe yourself from a fluffy cloud of consciousness. Pretty chilled!