HELP NOW!!! Are Dr. Scholl's massaging gel insoles meant to replace other insoles or just go on top of them?

HELP NOW!!! Are Dr. Scholl's massaging gel insoles meant to replace other insoles or just go on top of them?
I'd say they were just supposed to slid in there without taking the other out. but im not sure. i never used them either. sorry(:
I'm leaving tomorrow for Drum Corps International and my mom got me these Dr. Scholl's Massaging Gel Insoles for my shoes cause drum corps is brutal on feet. I opened them and put them in my shoes, and then I took out the existing insoles that came with the shoes and put them in. I don't know which I am supposed to do. They feel about the same kinda. How are they supposed to be used??? I feel dumb asking, but i've never used them before

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