In most cases it will be obvious to the experienced user, but I have found that some players trying it for the first time have put it on incorrectly. To summarise the sequence of use, the following should help where necessary: 

1    Before picking up the Saxophone, first stretch the SaxyStrap©  to its maximum

length by pulling the slider down towards the spring clip.

2   Then with both hands free, place the SaxyStrap©  over the head, so that all the

plastic and metal fittings lie flat on the chest and the webbing itself is not twisted. 

There are only two possible ways of putting it over the head, and it soon becomes

obvious if the wrong way is selected, because the SaxyStrap©  will not lie flat that

way.  The plastic slider will always be on the right hand side. The photograph on

the homepage illustrates the positioning well.

3    Now pick up the Saxophone and attach the spring clip to the ring on the body

of the Saxophone with the open end pointing to the right.  (This positioning is the

same for all makes of sling in order to reduce the possibility of accidental release

of the clip, as often happens with other brands of sling.)

 4    Now, with the instrument partly supported by the left hand, but still with some of

the weight of the instrument on the SaxyStrap©, pull the slider up with the right hand

until the mouthpiece is at the right level.  Subsequent adjustment is easily carried

out in an instant with the right hand only.