To add volume to long straight hair, start with a volumizing shampoo and conditioner. Blow-dry your hair upside down for lift at the roots, and use a round brush to create body. Incorporate light layering and texturizing sprays to enhance fullness without weighing hair down.

For long straight hair, trimming every 8 to 12 weeks helps prevent split ends and keeps the hair looking fresh. Regular trims support healthy growth and maintain the hairstyle's shape, especially if you opt for layered cuts.

Always apply a heat protectant spray before using styling tools like flat irons or curling wands. Limit heat styling frequency, and choose tools with adjustable temperature settings to avoid excessive heat. Incorporating deep conditioning treatments weekly can also help restore moisture and protect strands.

For a round face, long straight hairstyles with layers starting below the chin can elongate the face. Side-swept bangs or center parts add balance and reduce roundness. Avoid blunt cuts at chin length, which may emphasize the face’s fullness.

To maintain sleek, frizz-free long straight hair, use a smoothing shampoo and conditioner, and apply a lightweight serum or anti-frizz cream on damp hair. Avoid excessive touching, and finish with a cool air blast from your blow dryer to seal the cuticle and add shine.