Technology: Remarkably huge. Weight: Impressively small. The tougher the path and the higher the temperatures, the lighter your shirt should be and the more technique it should help you with. This is the path the Trekking Light Series has without compromise taken and, with, has set a new standard in technical apparel. The X-Bionic developers integrated into this shirt all the needed details: the 3D-BionicSphere System, AirDuct Pads and AirConditioning Channel. The result? A masterpiece in technological comfort with unforgettable beauty.