Invincible men's training shorts is lightweight and great for runners during the summer. Made of polyester fabric it wicks away haet and moisture. These shorts are also a great choice of louging at home as it keeps you cool and comfortable. High Quality Fabric: The shorts is manufactured using high-quality polyester fabric material, which is known to be highly absorbent, thereby keeping you cool all day long. It is a durable piece of clothing and hence lasts multiple washes after being used on a regular basis.