The Mountain Surf bibs feature a relaxed fit with body mapped fabrics that offer protection and comfort where you need it most. The seat and knees, where you most often get wet, are made with rugged, abrasion resistant ripstop fabric, and torso and thighs, where heat is generated as you move, is made with 4-way stretch fabric - both are 20k waterproof and breathable and feature a DWR finish to keep the weather on the outside and the heat on the inside.