There are a few things you can do to keep your T-shirts soft and prevent shedding:

1. Wash your t-shirts in cold water: Hot water can cause shrinkage and damage to the fibers in the fabric, leading to shedding. Cold water is gentler on the fabric and can help preserve its softness.

2. Use a gentle detergent: Avoid using harsh detergents or bleach, as these can damage the fibers in the fabric and cause shedding. Look for detergents that are labeled as "gentle" or "for delicate fabrics."

3. Avoid using fabric softener: Many fabric softeners contain chemicals that can damage the fibers in the fabric and cause shedding. If you want to add a little extra softness to your t-shirts, try using a few drops of distilled white vinegar in the rinse cycle instead.

4. Don't overload the washing machine: Overloading the washing machine can cause the t-shirts to rub against each other during the wash cycle, which can cause shedding. Be sure to wash your t-shirts in small loads so they have enough room to move around and avoid damage.

5. Don't dry on high heat: High heat can damage the fibers in the fabric and cause shedding. Instead, hang dry or dry on a low or medium heat setting.

6. Use right dryer setting: If you use a dryer, use the gentle cycle or lowest heat setting. Additionally, removing clothes while they're still slightly damp can help retain softness and avoid wrinkles.

7. Don't iron: If you can avoid it, ironing your t-shirts can cause damage to the fibers and cause shedding. If you must iron, use the lowest heat setting and be sure to use a pressing cloth between the iron and the fabric to protect it.

By following these tips, you can help keep your t-shirts soft and prevent shedding.