Slubs are sections of yarns that appear thicker or fuller in certain areas than the rest of the yarns and are created as the fibers are being spun into fabric. Originally, these lumps were considered defects in production and were rid of before the fabric was finished. However, over time, the slub became stylish and accepted in such a way that machines were designed to create slubs on purpose and more frequently in fabrics. Thus, the mistake or defect turned into a fashion statement.
Slub T-Shirts are the most familiar form of slubbed fabric to the average consumer, "shopper." Another type of slubbed fabric is slubbed silk, also known as dupioni silk, which appears to have thicker areas of yarns 
so that some areas look as though the yarn was spun on top of itself. If you look close enough at the picture to the right, you will see that areas of the fabric are lighter than others, making it appear streaked. The darker areas are the slubs where the fabric is thicker and thus absorbs the dye heavier. There are not two different shades of dye which makes the beauty of this "defect" even more interesting.
Slub Tees can be some of the most comfortable shirts a guy can have as a basic in his wardrobe. Because of the purposeful defects in the fabric, the slubs make the shirt appear more stylish and can be passed off as more formal versus casual.
so that some areas look as though the yarn was spun on top of itself. If you look close enough at the picture to the right, you will see that areas of the fabric are lighter than others, making it appear streaked. The darker areas are the slubs where the fabric is thicker and thus absorbs the dye heavier. There are not two different shades of dye which makes the beauty of this "defect" even more interesting. Slub Tees can be some of the most comfortable shirts a guy can have as a basic in his wardrobe. Because of the purposeful defects in the fabric, the slubs make the shirt appear more stylish and can be passed off as more formal versus casual.
Old Navy's Slub-Knit Jersey Tees are heavyweight and come in a variety of colors and offer a more stylish look than a basic jersey-knit tee.
The Howe 'Moment of Glory" Split Neck slub shirt can be found at Nordstrom. This style has a more rugged look with long raglan sleeves and an added hem to incorporate a contrasting color at the sleeve hem and the neckline.
Also at Nordstrom is the short-sleeved Penguin V-Neck Slub Cotton T-Shirt. The slub in this particular shirt is more visible than some shirts that have subtle slubs. The heathered look is more apparent in this style, especially in darker colors and can be more easily recognized as a slub shirt.
