apparel used as sports wear with polo or crew neck with ribbed Cuffs
and collar in a knitted material.
jersey: a close-fitting pullover shirt.
A T-shirt (or tee shirt) is a shirt, usually with short sleeves and a round neck, put on over the head, usually without pockets (though terms such as long-sleeved T-shirt and sleeveless T-shirt are sometimes used, suggesting that T-shirt by itself has a more general meaning.)
A knitted undershirt with short sleeves, usually with a crew neck, although sometimes produced with a V-neck. Also called a tee-shirt. Made universally popular after World War II. Became the ubiquitous undergarment-as-outerwear after it appeared as such in the movies of the 1950s.