Looks like an archery glove...
Hey, I found this really awesome Etsy listing at https://www.etsy.com/uk/listing/267836226/genuine-leather-tooled-archery-glove
Leather archery gloves More
I need to make one of these for my husband. My bow has a shelf, but his doesn't,he's cut up his hand quite a bit because of it.
Leather archer glove. Guante arquería by SvartaLader on Etsy
Custom Made Archery Glove by Kurt and Bart (Costume Designer) in The Hunger Games: Mockingjay Part 1
Three-fingered archery glove in genuine leather. Made by yours truly.
Left Hand Black Archery Glove