Cock Sling is a hard-core. meaty cock-toy built tough for the long haul--but UNIT-X is a sleek. sporty. power-fucksling built for speed...it wraps around just the base of your dick and the top of your ballsack. no extra thick rings or chunky bits...it made from a all new TPR blend that`s 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 TRP blend...safe. non-toxic and pthalate free. wash with warm soapy water after use. ok with all lubes.