Osmo Straighten Up is a unique Keratin-based straightening complex that works with styling irons to lock in longer-lasting straightness, protecting against thermal damage whilst retaining the hair's natural oils and moisture. Completely cruelty-free.

Spray Osmo straighten up evenly over damp hair section by section avoiding the root area. Comb through. For best results, blow dry hair with a large barrel brush. Finish by using straightening irons in sections to lock in the effects. Lasts up to 3 days or until your next shampoo.

Straighten-up is suitable for all hair types.