BareMinerals Original Foundation Broad Spectrum in Warm Dark W45 is a mineral-based foundation designed to provide natural-looking coverage while being kind to the skin. 

1. Formula: It's made from a blend of natural minerals that are lightweight and breathable. This foundation is often praised for its ability to provide buildable coverage without feeling heavy.

2. Finish: The foundation typically offers a matte finish, helping to control shine while still providing a radiant look.

3. SPF Protection: With broad-spectrum SPF 15, it helps protect the skin from UVA and UVB rays.

4. Shade: Warm Dark W45 is formulated for medium to deep skin tones with warm undertones, making it suitable for those with golden or yellow undertones.

5. Skin-Friendly: The formula is often considered non-comedogenic, meaning it won’t clog pores, making it a good option for those with sensitive or acne-prone skin.

6. Application: It usually comes in a loose powder form and is best applied with a buffing brush for a smooth, airbrushed finish.

Ingredients: 

Active Ingredients: Titanium Dioxide 12.6%, Zinc Oxide 21%. Other Ingredients: Bismuth Oxychloride, Mica, Iron Oxides, Zinc Oxide, Titanium Dioxide.