Uphill, downhill or moving fast on flat terrain,the Mens Hydropore XT Vent Tee from Jack Wolfskin delivers unbeatable comfort when you're working up a sweat. This functional, stretchy T-shirt has a close-fitting, athletic cut and airy mesh inserts under the arms. The fabric also wicks perspiration efficiently away from the skin. So you always feel nice and dry, whether you wear the T-shirt on its own or as part of your layering system. The Hydropore fabric has several additional attributes that support your physical performance during high-output activities. It is very hard wearing and provides the reliable UV protection you need in the mountains or the summer sun and the S. Fresh fabric technology puts a stop to unpleasant odours.