If you are a fan of the best selling Screwballs by Oxballs, you are going to love the new and improved version. Hump Balls! Hump Balls cock rings are everything you loved about the original, but softer squishier, and even more durable than before. Humpballs is made from Oxballs super soft Skinflex-TPR, so it is made for comfortable extended wear and use. Color Black. From Oxballs.