"Doctor recommended - Kegel exercises strengthen pelvic floor muscles improving bladder control and overall better pelvic health. High Grade Silicone - The sleek ridged exterior of these Kegel exercisers are made from high grade silicone that is Phthalate Free, Latex Free, Hypoallergenic, BPA Free, and Dioxin Free. 100% Waterproof and designed with comfort in mind. Safe for use with water based lubricants Removable cord is velvety soft, designed for comfort, and makes it simple to remove Variable, weighted set responds to natural movement, strengthening and toning as you move your body."Dual weighted set great for beginners or advanced users. Exercise and tone pelvic floor muscles. High Grade Silicone"Exercise and tone pelvic floor muscles Heighten sexual pleasure High grade silicone Removable cord attached Variable, weighted set Contents: 2-pack set, 1 single-ball, and 1 double-ball Material: High-Grade Silicone, ABS, Stainless Steel Weight: Single 40g, Double 80.5g Length: Double 135mm x 34mm, Single 78mm x 34mm"