Details, Size & Fit. 7 pack briefs. The B Free Intimate Apparel The Ultimate Comfort Highcut Smooth Touch 7 Packbriefs have a Soft Micro Fibre construction for stretchability and a high-cut design for comfortable, everyday wear. The briefs have a cotton gusset for breathability and absorption. These knickers offer a side seam-free finish and have an ultra-smooth fabrication without riding up.Warm machine wash with like colours. fabric / material: Knit.Material: Nylon/Elastane.SKU: BF722AA27HYU.