The Xcel Infiniti 1mm Top w/2mm Radiant Rebound Hood & Insulate-XR Sleeves Rash Guard is ideal for core warmth and performance. Xcel's all-new Infiniti layering top with a 1mm 100% Ultrastretch body, Insulate-XR sleeves, and an attached 2mm Radiant Rebound lined hood with a bill and neck dam.