Brush on Block is an innovative mineral sunscreen integrated into a brush, providing sun protection for every outdoor activity. Main benefits Easy application and possibility of frequent use. Suitable for application over makeup, as a light powder. Ideal for sensitive skin and oily skin.result Broad spectrum protection SPF 30. Non-irritating protection against UVA and UVB rays. Translucent formula that provides invisible coverage for all skin tones.How it works The Brush on Block has an integrated brush that can be refilled, without the risk of spills in your bags or purses. When the powder runs out, it is easy to replace with a new cartridge.