Teenage underwear / innerwear / panty should be made of good quality fine and absorbent cotton which can breathe as well as absorb too! Sweat, perspiration needs good knitted fabric. A good panty can give better shape and look to hips. Even the elastic quality should be good, so that it is not very tight when new and obstract blood circulation for longer time. If it is too tight, it will leave marks on skin, also give itchy feeling after removal. Also make a habit of not wearing of panty during sleep at night for free blood circulation
Innerwears aare very important, as we are wearing it 24X7, it has to be comfortable, washed, preferablly made of cotton, preferably white in color.