Saddle bags are made of closed-cell, limestone-based neoprene that prevents cracks, offers all-way stretch, insulates hot or cold, and wont sweat or leak. Best of all, it keeps drinks ice cold for hours! Great for doctoring cows on the ranch, keeps your coffee hot on one side and the medicine from freezing in the other. Rear bags feature reinforced seams to provide strength and zippered tops to keep the bags securely closed.