From M&S
Wrap up in comfort after your bath or shower with this pure cotton towel. It's made to a 500gsm weight for a substantial handfeel and finished with a charming blanket stitch trim. M&S' StayNew™ technology keeps colours bright and fabrics soft for longer.This towel’s GSM rating is 500 GSM. GSM stands for grams per square metre and indicates the weight and density of the towel. 450-600 GSM signifies a light to medium weight towel: good value and quick-drying, with added benefits such as low-twist yarn to make them feel more like their heavier-weight counterparts.