turn the cups on the back;
and with a light movement to release the hooks of loops in front.
If the brand model with a fasting in front, the principle of unfastening a little different. The fastener mechanism consists of plastic (metal) parts that mirror each other’s shape. Moreover, if they are folded together, thanks to the fastening, they become closed. Therefore, it is necessary to bend the fastener to each other. With the correctly selected side of the addition of the mechanism, the click is heard. This means that the mechanism has unbuttoned. When folding fasteners, force is not necessary, otherwise you can break the mechanism.