ðɪs fˈɔːɹmz ɐ ɹˈaʊnd ɹˈɪdʒ ðæt pɹədʒˈɛkts ˈaʊtwɚdz fɹʌmðə fˈeɪs ʌvðə fˈæbɹɪk, ænd ɪz jˈuːzd æz ɐ dˈɛkɹətˌɪv diːtˈeɪl.
This forms a round ridge that projects outwards from the face of the fabric, and is used as a decorative detail.