Cocksling is a hard core, meaty cock toy built tough for the long haul but Unit X is a sleek, sporty, power sling built for speed. It wraps around just the base of your penis and the top of your ball sack, no extra thick rings or chunky bits. It made from a all new Thermoplastic Rubber TPR blend that is stretches more and it feels more rubbery. Unit X fits big or slim dicks, it fits huge balls or high and tight nut-sacks. Made of the best TPR blend. Safe, non-toxic and pthalate free. Wash with warm soapy water after use, ok with all lubes.