The Acid Crewnecks are handcrafted, meaning each crewneck has their own unique design on it. By using an acid dye bleaching technique, the crew gets an acidic look with white and rusty tints. The crewneck itself is made of premium heavyweight cotton (260 Grams) with a soft polyester finish for comfort. The crewneck has a regular fit. Want to go for a more baggy fit; go one size up.