Swimming Paddles No straps (fit)

Hi, this is a first.

I've never designed anything like this, but here it is. I'm swimming two to three times a week and I intend to fully test and improve the model. 

Please give me as much feedback as possible if anyone uses it.

I printed the following settings:

PETG - 20% infill

Supports on the fingers

Concentric top and bottom (just for looks)

Ask away, I'll be working on this every now and then, hopefully to a model I can adapt to any hand