Yes, they are reliable. An amazing product that feels great. My husband loves this product. He also loves the vaginal tightness and he says it feels bigger.T is true. I love the texture of this and he loves the tightness of his vagina. I would recommend this to a man who wants a threesome but his wife doesn’t. It’s very realistic and can enhance your sex life in ways you never thought possible. I would recommend it to anyone who has enough cupboard space.