When using these men's t - shirts and premium t - shirts from The Pedros by Zascanauta, just put them on and enjoy the comfort. Make sure to pick the right size from the available options (S - 6XL for regular t - shirts and S - 3XL for premium ones). When it's time to clean them, machine wash in cold water, turning the shirts inside out and washing with similar colors. Only use non - chlorine bleach if necessary. After washing, it's best to hang them dry. If you're in a hurry, you can tumble dry on cool or low heat. Don't use fabric softener as it can fade the colors. Also, avoid ironing and dry - cleaning these shirts to keep them in good condition.