Short answer
Use 160–180 GSM single jersey for regular summer cotton T-shirts, 210–240 GSM combed cotton or French terry for trendy oversized drop-shoulder tees, 200–220 GSM pique for polo shirts, and 300–350+ GSM 3-thread fleece for winter hoodies.
When placing wholesale or private-label orders in Khaderpet or Angeripalayam in Tiruppur, specify these exact fabric specs:
Tell us what you're looking for and we'll point you to the right market or supplier.