The Killa Hydro is a low-profile pair of swimming goggles that are lightweight and provide an optimal fit. They're the best choice for swimmers looking for small, comfortable swimming goggles.  Optimal Fit The ergonomic, three-dimensional gasket fits to your face and reduces pressure around the eyes to improve water tightness. Comfort The adjustable clip-on straps are very lightweight and comfortable, making them ideal for intensive pool training. Anti-fog The unique, long-lasting anti-fog coating prevents fogging and allows for clear vision at all times.