Castelli Core Mesh Sleeveless Base Layer: Minimalist piece for warm weather usage. Fully open mesh holds the jersey off of skin & the resulting layer of air works to regulate body temperature. Coupled with very little moisture absorbing, this base layer stays cool & light. Sleeveless version The next-to-nothing base layer This is the perfect minimalist piece to keep you cool in warm weather. The fully open mesh serves mainly to hold the jersey off the skin, creating a layer of air between your skin & the jersey to help you maintain a constant body temperature. The fabric absorbs practically no moisture, & it weighs next to nothing so it wont weigh you down. View a larger copy of this image for a more detailed view. Fully open mesh creates a layer of air between your skin & jersey Body wrap design wicks away moisture Minimal seams for maximum comfort Sublimated logo Cut long to stay tucked in shorts 60g (Large)