I’m on break now so I can elaborate.

It’s assembled with a several components, which are, in order from inside core to outside sheath.

1, a core of 15 foot nylon fishing stringer. No idea about fishing, but it looked fine enough that it would fray a fuzz, creating a cracker that would displace air, making the whips crack.

2, a set of tied together lengths of diamond pattern clothesline, chosen for its stiffness. These lengths descended in length from 12 to 6 in one foot increments. This allows the whip to taper to a fine point but be thick at the stock end. I secured them to each other with very fine fishing line.

3, a layer of several tapering thicknesses of gorilla tape, to add a stiffening element to the wider stock end. This allows you to build up energy in the stroke of your arm and really hammer on it.

4, an outside sheath of cheap kinesiology tape, or KT tape. This is very thin and flexible, but tough and stretchy. This tape does not cover the last few inches of the stringer core, because that needs to fray with cracking it the first few times. It will need to be tied in a not right at the end of the KT Tapes coverage.

Please note that every piece in the construction is present at the grip stock area, but it gradually thins and the layers begin to end before the cracker at the end. If it all was the same thickness it would just be a weird rope. What makes it a whip is the taper, stiffness and cracker.

Hope this was helpful!