Heavyweight t shirt options are usually more durable and better at holding their shape than lightweight ones, making them great for long-term everyday wear. They don’t stretch out easily and tend to last longer overall.
However, they can feel warmer in hot weather because the fabric is thicker. Most good-quality ones don’t shrink much if washed properly, and they usually soften over time instead of becoming stiff.
They are worth the extra cost if you want something long-lasting and structured, but less ideal if you prioritize light, breathable comfort in heat.