Just For Men Ultra Medium Brown A-35 35g Air-Activated: Innovative formula uses oxygen in the air to preserve hair’s subtle variations. Shuts Off: Shuts itself off so it can’t over colour. Always looks natural. Easy: No mixing, no mess. Just comb in, shampoo out. Takes only 10 minutes. Gentle: No peroxide and no ammonia formula makes it the gentle haircolour. Traditional haircolour products contain peroxide and/or ammonia, and can over-colour hair making it look unnaturally dark and flat. This Just For Men® innovation is activated by oxygen in the air instead. It preserves the natural, subtle variations in your hair. How to use READ AND FOLLOW DIRECTIONS ON ENCLOSED LEAFLET. Do not use this product at all if you have skin depigmentation problems such as white patches on your skin (a condition called vitiligo) or if you have a family history of skin depigmentation problems, as an allergic reaction may cause temporary or permanent loss of skin pigment.