A lacrosse player wearing a scrimmage vest, the dark blue garment
A scrimmage vest, sometimes referred to as a pinnie or pennie, is a piece of clothing or sportswear, often made of mesh, used in practices as a substitute for a sports team's usual uniform or to differentiate temporary teams in informal scrimmages. Some teams elect to have benched players wear them during a game. A vest can come in a variety of forms, including a racerback cut, collegiate cut, basketball cut or lacrosse pinnie.
Vests are usually made from poly-mesh material. Screen printing or vinyl heat press artwork is often applied directly to the mesh. New techniques include dye-sublimation.