The Truckt set from the brand Oxballs is made for comfort so it is soft and stretchy. It has enough stretch to go around the penis and testicles. Since there are two rings, you can wear them in a few different ways including using one as a small ball-stretcher. Truckt is wonderful for firmer, lasting erections and helps delay ejaculation. Made of 100% TPR which is non-toxic and pthalate free. Safe with water and silicone based lubes.