Who is it for: Sirona Menstrual Cups are ideal for girls and women of all ages and flow levels. Size M (Medium) is ideal for women with a medium build or who have not given birth to a child or women up to the age of 30 yearsBenefits: No Menstrual Odor, Irritation, Dryness, Discomfort, Itching Or Rashes (Caused By Sanitary Napkin Pads). Covers heaviest to lightest flowSpill and Leak-Proof: Made with 100% Medical Grade Silicone, the cups are highly flexible to fit perfectly and collect blood without spillage. The rim of the cup creates a seal around your vaginal walls ensuring leak-free protectionLong lasting and Economical: Provides up to 10 hours leak proof-protection. With proper care and good cleansing, it is reusable for as long as 15 yearsSuitable For: You can wear Sirona Menstrual Cup during all physical activities and even overnight. It is an ideal menstrual aid for all kinds of sports, travelling, swimming, cycling, diving, trekking, dancing, climbing or common daily usage. It has no wings or strings and leaves no residual fibers.