Our number one selling bra-related gadget: the Strap Doctor. Women have sworn by it for years for the peace of mind and comfort it provides to those suffering from slipping straps. Whether it’s both straps falling off or just one, this resuable, non-adhesive invention works with all sorts of straps and is very comfortable. Each pack comes with 2 pairs that work under narrow and regular straps and are clear to the eye. One half is rough silicone and the other is smooth, making them stick to each other and making the strap immovable!