Our top of the line FS bib shorts are constructed from seven body panels and a highly breathable bib top. The flat-lock seams (FS) are strategically placed for comfort and performance and minimize interior abrasion. The body fabric has been extended up for an improved bib top fit, feel, and look. Flat-lock seam construction adds ¼” visible seams to the garment. Standard PowerGrip leg openings are ultra comfortable.