The basic t-shirts are made out of brushed and softened polyester material in a regular fit. This polyester is very durable and has all the moisture wicking properties superior fitness and workout clothes should have. These t-shirts are further offered in two different types of sleeves, namely regular sleeves and raglan sleeves. Regular sleeves or set-in sleeves as they are more popularly known, have a seam at the shoulder. This seam continues around the arm of the t-shirt giving it a natural look. These types of t-shirts are perfect for most sporting activities that do not involve much arm rotation like football etc. The Raglan Sleeve is one continuous piece of fabric that starts at the neck and. Extends down to the underarms. This gives the underarm a wider area to move in. This allows for a bigger and wider arc of rotation and movement and is extremely comfortable in any and all activities that involve using the arms such as working out, racquet sports etc. The raglan sleeves also give you a very sporty look as they enhance the shoulders to advantage.