100% canvas production. The length of the strap is about 34 cm. The number of entries per group varies according to the specifications sold. Please select the correct number before placing the order. Do not accept more than one single merger price change (ex: two orders into the group can not be modified into a set of 4 into the price). In Taiwan, if you choose to mail the shipping fee, the postage will not be refunded. The Hong Kong area can be sent directly to SF Express or collect goods. The shipping fee is about NT$120 (within 1kg). The actual shipping cost is mainly informed by the driver. Please understand the relevant fees before ordering.