A silicone bra features self-adhesive silicone for comfort & natural shape and front closure for lift & cleavage respectively. Due to its adhesive nature the silicone bra has a tendency to stick on to the body, contradicting to the strapless bra which often slip and slide around.
Bra inserts are, simply put, just what they sound like. They are separate cups that can be placed inside a bra to add padding, shape, or lift. Bra inserts can be made of different materials and come in different shapes and colors.