The straight bun is any easy style for natural hair, it can help keep your natural hair straighter for a longer time. Start with hair that has been blown out or flat ironed. To minimize heat use stretch your hair using rollers and sit under a hooded dryer instead of straightening. Watch my video here on how I straighten my hair with minimal damage.
1) Pull hair into a ponytail using an ouchless holder or banana clip. In the pic above I used a clip.
2) Pin hair under using jumbo bobby pins.
3) Fan hair out into a U type shape and secure with additional pins if needed.