This Helly Hansen Men's Dry Striped Boxer is made with Helly's own 100% LIFA Stay Dry Polypropylene. That makes it a great choice for all activities including skiing, water sports or just going to the gym. The HH Boxer features eyelet construction, a close to the body fit and flat seams to make it extra comfortable to wear for long periods. The benefits of the LIFA fabric include: Excellent moisture transportation, lightweight with high elasticity (but painful when twanged) that allows unrestricted freedom of movement, good shape retention, non-pilling, odour resistant and quick drying. Why look anywhere else for a proper sports boxer?