Period Underwear Boxer Briefs For STP Packing UB01

I do not use an STP device but I use it for my foam Spectrum packer. If I would change anything about the design I would add a third button instead of just two because it would protect the packer from the fabric of my jeans a bit better, but I do realise that this packer is not what it is intended to be worn with but it still works really well! The fabric is comfortable and the sizing is accurate. I would buy again!