Trespass knows outdoor gear, and these women's baselayer trousers are a solid choice for layering under your walking trousers or wearing on their own for yoga or running. They're made from a super lightweight, 4-way stretch fabric that moves with you completely, whether you're scrambling up a hill or stretching after a walk. The ergonomic fit is designed for activity, so they won't ride up or bunch. Key features include clever ventilation zones (though the description points to underarms/back, on trousers this likely refers to breathable panels) to help manage temperature and flatlock seams that lie smooth to prevent any chafing, which is a godsend under other layers or a backpack hip belt. They have a simple, comfortable elasticated waistband. They're basically the ideal first layer - warm enough to trap heat but breathable and non-restrictive. A reliable piece from a trusted UK outdoor brand for all your adventures.