All other finger splints that I have seen (and I have seen quite a lot) use a flawed design, which constricts the blood flow to that finger. This in turn causes tissue damage and and in extreme cases, kills the finger This design fixes the problem by allowing the finger to swell.  It is also a design that is nearly identical to ones used professionally. To be applied with any type of securing tape or professional elastic band. Recommend gauze between fingers if you choose to “buddy tape.”