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A simple test to check for genuine wool or cotton is to burn the fabric:- 1. Place a 5 cm. swatch in a fire-proof container and ignite a corner of the fabric – – Cotton will smell similar to the smell of burning paper. – Wool will smell similar to burning hair or feathers. – A chemical or plastic smell will indicate the presence of synthetic polyester materials. 2. Examine the cool ashes – – Cotton ashes are soft and fine and turn to dust when rubbed. – Wool ashes are black and brittle that crush when fingered. – The melted remains of synthetic are hard lumps. 3. Hold a few threads of the fiber in tweezers and slowly move a flame towards them – – Cotton and wool fibers ignite as the flame draws near. – Synthetic fibers curl away from the flame and tend to melt. What is the “S” labeling on a woolen fabric? (Super 150’s) The “S” number on a wool fabric indicates the fineness of the fiber used in the garment; the higher the number the finer the yarn. Fiber fineness is one of the factors determining the quality and performance of a wool product and in recent years it has become an important marketing device used by many mills, garment makers, and retailers. A garment with a very high “S” number feels better, much smoother to the touch, but is more liable to crease. S 100s and 120s should be the mainstay of your wardrobe, durable and resilient; S150s and 180s should be thought of like caviar – wonderful but not for every day! Although there is significant difference in the feel between an S 100 and an S 180 fiber, both are very fine fabrics – ultimately it is the look and the tailoring that matters most. Everything else is just a number!