Replacement shell is a great option if you only need a new boot shell and other parts of your Flex Boot are still usable. The shell comes with two rivets to attach a TPU gaiter to the shell, but the TPU gaiter itself, or any other parts, are not included.
The idea is that you take all the other parts from an existing boot and attach them to the new boot shell. This is more environmentally friendly than purchasing a complete new boot, and also saves you money. Check out the individual product listings for video instructions on how to attach the parts to a new replacement shell.
Choose either a standard or wide shell, depending on what you currently have. The boot shell size is embossed on the side of the boot, so you can check and make sure that you order the correct replacement shell.