Pants and tights are two different types of running bottoms that have different advantages and disadvantages. Pants are looser and allow more air flow against the skin, while tights might provide more support and less drag for faster runs. Pants are often worn for training or casual running, while tights are better for competing or fast running. Tights may also have compression technology to help with performance by improving blood circulation and reducing muscle fatigue. Select ASICS running pants and tights also feature pockets for securing small personal items (keys, phone), which can be convenient and practical. Other factors that might contribute to choosing either pants or tights are personal preference, weather conditions, and running goals.