All of the safety harnesses are easy to put on and come with all the necessary buckles and straps. Take a look at the Sala standard vest style body harness. This safety harness has a no tangle design so you won't spend too much time getting into it or worrying about putting it on wrong.
Sala ShockWave2 Shock Absorbing Lanyard
Sala 1224306 ShockWave2 Shock Absorbing Lanyard. Expands to 6' and contracts to 4-1/2' in reaction to your movements....