What it is and why it's in the formula
Sweet almond oil (Prunus amygdalus dulcis) is a long-standing staple in nail and cuticle care thanks to its blend of oleic and linoleic fatty acids, which help soften and condition the surrounding skin. It's gentle enough for daily use and doesn't leave the sticky residue that heavier balms can, which fits the fast, no-rub-in nature of a mist application.
Where it fits in the full formula
Sweet Almond Oil is one of 16 ingredients disclosed openly on the PureNail Pro label — none of the formula sits behind vague "proprietary blend" wording. You can see the complete breakdown, including which oils pair with it, on the full ingredients page.