This Henley shirt is amazingly comfortable and durable. The 8 oz slub terry fabric is heavier than a t-shirt, yet lighter than most sweatshirts. What is slub terry fabric? Well the 'slub' refers to the textured look of the fabric; the 'french terry' is a knitting technique that uses loops and soft piles of yarn on one side and a smooth, soft surface on the other side. The result is an absorbent, soft, mid-weight, moisture-wicking material that's super comfortable to wear any day of the year.