T-shirt manufacturers use many terms to describe their products. The terms are not always consistent and it helps to have a reference guide.The following is the official Green Man T-Shirts Guide to understanding t-shirt terms:Unit of measurement that defines the fineness of cotton thread. A standard spool of single-ply cotton thread is comprised of 840 yards of cotton thread. If it takes 20 spools to weigh one pound, then the thread on those spools is referred to as 20s cotton, or 20/1. If 30 spools weigh one pound, then the thread on those spools is referred to as 30s cotton thread, or 30/1. Men’s T shirt
If it takes 40 spools to weigh one pound, then the thread on those spools is referred to as 40s cotton, or 40/1. The higher number means a finer thread, and thus a finer, softer fabric is created. T-shirts made of 30s and 40s are softer, finer, and have better drape than t-shirts made of 20s. The terms are used many ways, but it’s the number that counts; “20s,” “20/1,” and “20 singles” are the same. Threads can be twisted together into thicker strands. If two 20/1 cotton threads were twisted together, it would be referred to as 20/2. Rayon made from bamboo cellulose. Although rayon is a man-made synthetic material, most experts agree it is readily biodegradable. Bamboo fabric is extremely soft and has excellent drape.