USB Silicone Wristband is very suitable for promotion, trade show, advertisement, sports or other events. Free mold charges for existing designs. The material is 100% Silicone which is Eco-friendly, non- toxic, soft and comfortable. Logo made by printed, embossed, or debossed. Memory capacity including 64MB, 128MB, 256MB, 512MB, 1GB, 2GB, 4GB