What is GSM? GSM stands for grams per square meter, it's the standard measurement for the weight and quality of fabrics including towels. The number refers to the density of the towel which is the higher the better. Our 100% cotton with 550 GSM high quality towel set is soft, last longer due to high density and more absorbent than competitors with hiding product information. Ultra luxury Towel set is the best choice for customer who are looking for soft and absorbent towel with reduce linting process. Our towel set includes 2 bath Towel 27x54 inches , 2 Hand Towel 16x27 inches and 4 wash Cloth 12x12 inches 100% cotton ultra long staple fibers, 2ply yarn for luxury softness 5 Star Hotel Grade. 550 GSM and Double lock Stitching for durability . Comes in a ribbon gift pack so they can be an excellent gift for your loved one. Washing instruction: Color fastness to 60 degrees Celsiud/140 degrees Fahrenheit. Do not use bleach. Wash colors separately.