For a trimmer fit, we like the Helly Hansen Alphelia 2. 0 Pant. It features 4-way stretch materials and articulated knees for added mobility on the hill, as well as breathable waterproofing, mesh inserts, and lightweight insulation to keep us dry and comfortable from first lap to last. Plus, it's sustainably made with a chemical-free water-repellent treatment and recycled fabrics for peace of mind.