Answer (1 of 2): i don’t recommend using duct tape. it doesn’t have the elasticity you need to keep your chest flattened and secure (at least in my experience) but in general it just isn’t safe. the two that i’m aware of and have used are KT tape or Trans tape. i prefer KT tape and at first i did
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Fits all sizes. Cut to desired length Medical Grade Gender Neutral Tape. No harsh chemicals. Much safer to use than duct tape Strong. Regardless of
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How long can you wear trans tape? Are there any ways I can use less tape while also keeping a flat chest? - Quora
Can you bind with tape under a binder? If you follow the binder rules- I do lots of physical activity, and after work hours, I'd like to be able to take off my binder, and still be kind of flat while I excersize. - Quora
How to bind safely and easily without having access to a binder - Quora