This bath sheet's GSM rating is 500 GSM. GSM stands for grams per square metre and indicates the weight and density of the towel. M&S' towels range from 450-800 GSM. At the lower end of the scale, 450-600 GSM signifies a lightweight towel: good value and quick-drying, with added benefits such as low-twist yarn to make them feel more like their heavier-weight counterparts. At the higher end of the scale, 600-800 GSM signifies a heavier, more luxurious towel. The pile in these deluxe towels is denser and more lavish. Towels at the lower end of this range are great for everyday use, while those at the higher end resemble the towels you’d find in a luxury hotel. Made from 100% pure cotton, this super-soft range of spa towels is the perfect accompaniment to any stylish bathroom. Featuring a contemporary striped design, coming in a range of calming colours, these bathroom towels are available in a full range of sizes, including hand, face, guest, bath towel and a luxuriously large bath sheet. Perfect for anyone looking to add a touch of luxury to their relaxing bath time routine.