What is this little pocket in my gym shorts used for? : r/whatisthisthing

PixelThat, Men's Gym Shorts, Men's Sweatshorts

Small Pocket Inside Shorts

Men's Pocket Shorts & Gym Shorts with Pockets – Gymshark

I have a wallet with small wallet pockets, what could they be for

G Gradual Men's 7 Athletic Gym Shorts Quick Dry Workout Running Shorts with Zipper Pockets (Wine Small) at Men's Clothing store

Small Pocket Inside Shorts

PIDOGYM Men's 5 Gym Workout Shorts,Fitted Jogging Short Pants for Bodybuilding Running Training with Zipper Pockets Army Green at Men's Clothing store

Found connected to the inside of my pocket of a pair of swim

Small Pocket Inside Shorts