A knitwear combed yarn polo shirt refers to a polo shirt made using knitwear fabric that is crafted from combed yarn. Here's what each of these elements means:

1. Knitwear: This is a type of fabric created by knitting, as opposed to weaving. Knitted fabrics are generally more flexible, comfortable, and have more stretch than woven fabrics. Knitwear is commonly used in sweaters, t-shirts, and polo shirts because of its softness and breathable qualities.
2. Combed Yarn: Combing is a process that improves the quality of yarn. It removes shorter fibers, dirt, and impurities, resulting in a smoother, finer, and stronger yarn. Combed yarn gives the fabric a soft feel and makes it more durable, which is why it’s often used in high-quality knitwear.
3. Polo Shirt: A polo shirt is a casual, short-sleeved garment typically featuring a collar, a placket with a few buttons, and sometimes a small pocket. It’s a popular choice for casual and semi-casual settings.

A knitwear combed yarn polo shirt would thus be a high-quality, soft, and durable polo shirt made from knitted fabric, using fine combed yarn for a smooth texture and enhanced comfort. It would offer a comfortable fit with the breath ability of knit fabric and the long-lasting quality of combed yarn.