I have very sensitive underarms and I went through every drug store antiperspirant I could find and everything left me with irritation and dark red rings under my arms. I came across no pong in an article talking about the benefits of using natural deodorants especially for sensitive skin so I hesitantly placed an order for one of each kind to test what would work for me. Turns out they all worked for me! I am a big fan of the bicarbonate free ones as they keep me fresh through an entire work day and the irritation under my arms has completely disappeared! I bought 5 tins in August and I only just ran out a week ago so you get your moneys worth for the amount of product in each tin. I have recommended no pong to friends and family as it has changed my life!