DetailsJack Wolfskin Women's Pants Size Chart Trek-tested and adventure-approved! The ACTIVATE XT softshell trousers have proven their worth on numerous adventures. They’ve become a firm favorite of the Jack Wolfskin collection, and a must-pack item on many an outdoor fan’s kit list. The ACTIVATE XT trousers are designed to be worn all day long and perform particularly well on demanding terrain. The stretchy, highly breathable FLEX SHIELD fabric ensures superb freedom of movement, keeps you dry during sweaty ascents, and can even cope with light showers. And the trousers only let a little fresh air in – no wind.