Yes, fleece jackets are excellent for outdoor activities due to their warmth-to-weight ratio, making them ideal for layering in various weather conditions. The breathable nature of fleece helps regulate body temperature, preventing overheating during physical activities. While fleece is not windproof or waterproof, it dries quickly if it gets wet, making it a reliable choice for many outdoor adventures, especially when paired with a waterproof shell in harsher weather.