Squat Nimbleness

Prerequisite: Dwarf or a Small race

Description not available (not OGL).
But here is a summary:

+1 in Str. or Dex., your speed increases by 5 ft, and proficiency and advantage to escape with Acrobatics or Athletics checks.
Xanathar´s Guide to Everything
  1. DnD 5e Feats › Squat Nimbleness