Kit appropriate to the situation.
It all depends on what type of flight is planned, Local flight may only require me to carry a mobile phone.
Any water crossing out of gliding distance requires life jackets with PLB (GPS equipped), distress flares, dye sea marker and a life raft during the summer, winter time also requires an emersion suit.
The life raft stays in the aircraft at all times in the winter to provide a shelter in the event of a forced landing.
Clothing is always enough to cover the body and non synthetic and gloves are always available, this is for all flights.