OK. I admit it. Making underwear was my idea. I like the support and feel on lycra shorts under cargo shorts and so I had a few pairs of our original lycra shorts (SH5) made in cotton/lycra. They felt great. Eventually, one of our designers (Angelique) developed a pattern for a seamless front, mens lycra short. We began calling it the (NFS). NO FRONT CENTER SEAM. Finally, comfortable bike length underwear for men. The most comfortable underwear you will ever wear. No center seam to divide your package. Smooth and seamless front. That style code is the M50. We have since expanded the underwear line to include a boxer (A17) and a really low cut boxer (M61). We now offer all three styles in value 3-packs.