O\'Neill 3mm Chiller Killer Wetsuit Jacket The O\'Neill Chiller Killer 3mm wetsuit jacket is the perfect item to wear whether you\'re in or on the water, in-between sessions or enjoying the view. O\'Neill has you covered. We offer a wide array of high performance layering pieces that can be used on their own or combined with accessories to protect you from the elements. Cold water, wind and U.V. protection enable you to last longer and enjoy every minute outside. First In, Last Out. More Fun. 3mm FluidFlex™/Fluid Foam Loose Fit