Louis Garneau designed the Men's Rugged Long-Sleeve Jersey with all the mud, dirt, and dust on gravel trails. It's a 4-way stretch softshell with a light, thin 2. 5L waterproof, breathable membrane to protect you from mud and dirt. Power mesh runs along the sides to bolster ventilation and mobility. We also like the detachable bottle opener that comes in handy every time we reach camp.