What are the 2nd Skin circles? The 2nd Skin dressing circles are hydrogel pads that have been specially designed to protect against blisters. When can I use the 2nd Skin circles? Use the 2nd Skin circles to help protect against blisters & to prevent skin pressure, rubbing & chafing. How do the 2nd Skin circles work? The 2nd Skin circles are made mostly from water, which helps to soothe & cool the skin on contact. Contains: 48x 3" circles.