Acute is specially designed for harness play with an adjustable O-ring harness. The angle is absolutely perfect and sized perfectly for both vaginal or anal play (1 1/4" x 5 7/8" from the base). Made of ultra hygienic silicone. Extremely easy to clean, doesn't erode or react to most lubes and oils. Note: Silicone lube should not be used with silicone toys.