o.b. ProComfort Tampons are made of compressed layers of highly absorbent fibres which are interwoven to hold together and remain intact. Safe and convenient, o.b. ProComfort Tampons expand in width to give you a gap-free snug fit. With the right protection for you, OB Tampons can help prevent staining accidents and menstrual odour. Body structure and menstrual flow differ from woman to woman. Therefore o.b. ProComfort Tampons are designed in two sizes ? Regular (for average flow) and Super (for extra protection during the night and heavy flow).