Thwala bags are hand crafted from genuine leather. With use, the bag will stretch and mould around your cellphone cover. Ensure that leather goods do not get wet. Take care when using your bag by not placing it on any wet surfaces. If there is dirt on your bag, you may use a dry cloth to clean your bag. Our Thwala bags are made from smooth natural/ untreated leather so there can be wear marks over time, which contribute to the entire look and feel of the bag, as it is worn. If your Thwala bag is a light colour, we suggest you are careful with what clothing you pair your Thwala bag with, as dye transfer marks onto the bag are possible from dark coloured denim clothing.