On a vertical rectangular-shaped embroidered item arched convexly at the top and bottom, a vertical gray and white chevron-patterned background, surmounted by a purple stylized panther head in 3/4 perspective, nose, eyes, mouth, and details in white. Attached above the rectangle, a white scroll edged with a 1/8-inch purple border inscribed “PANTHER” in purple letters.  Attached below the rectangle, a white scroll edged with a 1/8-inch purple border inscribed “BATTALION” in purple letters. The overall dimensions are 3-1/2 inches in height and 2-1/2 inches in width.

Weslaco High School was established in 1921. The chevron patterned background suggests the school’s JROTC mission to instill in young people the social foundation to become responsible citizens. Purple and white are the school colors, signifying beauty, honor, and excellence. The panther is the school mascot, a symbol of power and strength. This fierce beast further alludes respect and grace, which the teams of Weslaco embody as tenets of the panther.

The shoulder sleeve insignia was authorized on 15 December 2023.