Several formulas explicitly avoid sulfates, silicones, parabens, and dyes; others are labeled sulfate-free and silicone-free or noted as formulated without sulfates, parabens, and phthalates.

Sizes range from 8 fl oz up to 16 fl oz; specific sizes shown include 8 fl oz (US), 12.0 fl oz (US), 12 fl oz (US), 13.5 fl oz (US), 14 fl oz (US), and 16 fl oz (US).

Some co-washes are formulated for dry, itchy, or sensitive scalps and include active ingredients like zinc pyrithione, tea tree oil, and olive oil to help relieve itch, flaking, and related scalp irritation.

Usage guidance varies: some list 'Recommended Use: Daily,' while others recommend using the product as a non-lathering co-wash on days when hair doesn't require a deep cleanse.

Common warnings include keeping products out of reach of children; some listings also note potential eye irritation and include general product warning statements.