Original Whoop watch strap, version 4.0. The strap is new and unused, "the box was only opened". It was purchased from the Whoop company, the invoice is available. Navy blue color, blue color. Reason for selling: It does not match the strap I have. Location: Al-Qassim / Al-Bukayriyah. Serious buyers only. In Al-Qassim, hand-to-hand delivery. Outside Al-Qassim, shipping is on the buyer. Note: This is only the strap, without the device.