This lace back brief uses our patented SensElast seamless technology, will give you sexy & comfortable wearing.Use SensElast seamless technology inside front waistband /front leg opening, with high stretchable and recovery, no deformation & curled selvedge after arbitrary stretching and washing.Senselast with fleece-faced tactility, comfortable wearing.Use soft-feeling lace fabric at back panel, sexy & breathableSoft & thin elastic at back waistband,stretchable & no compression.Seamless bonded cotton gusset lining, anti-bacterial.