The benefit of soy is that it
a. doesn't go bad
b. is very low in fat
c. has very strong taste
d. is naturally low in saturated fat

The benefit is naturally low in saturated fat.

If it's a smaller child or infant, place one on the middle of the chest and on the child's back. (if it is a bigger child with enough room for two, place one on the upper right/your left of the chest, and one on the lower left/your right) the pads should never touch each other.