Hand and Finger Brace

This is merely a merge of two designs I found. Thanks to
(Moldable Finger Splint) by FFFTechnology
https://www.thingiverse.com/thing:3830279
and
(3D Printed - Thumb + Wrist Immobilization Brace) by ktchn_creations
https://www.instructables.com/id/3D-Printed-Thumb-Wrist-Immobilization-Brace/

I used a CR10 and was able to print flat with 300x300 surface.

Soak in hot water for 10 - 15 seconds to make it malleable.
Cover your hand and finger with a sock or glove as it will be hot and may cause burns.
Use heat gun to make fine adjustments after you have molded the main wrist and hand shape.