Same here with the L2P, I could not get a solid deep fit with them due to their housing necessitating a shallow fit. I haven't tried many TWS, but all others I have tried have had a good secure feel. HiFiMan TWS600 - Good mids and treble, but lacking bass. Shanling MTW100 BA - Excellent dynamic balanced sound. SSK TWS - Good mids and treble, ok bass, budget priced. EDIT: I would look for the IPX rating of TWS if they're going to be used in the gym.