The PneuGel. Chevron. Walker has all the fine features of our standard Chevron. Walker. Plus we include our patented PneuGel. dual compartment technology. This bladder is removable and may be placed in the freezer to be used as a cold therapy device. The bladder is also inflatable to provide compression and to insure a proper and comfortable fit around the ankle and foot area. This unique design also provides support to the arch of the foot. A fabric layer next to the skin reduces the potential for skin irritation and condensation buildup duringcold therapy". This walker is designed for either the left or right leg."