As an AI language model, I don’t have real-time information on the latest fashion trends beyond my knowledge cutoff in September 2021. However, I can provide you with some information about types of track pants that were popular at that time, and they might still be relevant today.

1. Joggers: Jogger-style track pants have been quite popular in recent years. They typically have a tapered or slim fit, elasticized cuffs at the ankles, and a drawstring or elasticized waistband. Joggers often come in various materials like cotton, polyester, or nylon, and can be found in different colors and patterns.
2. Athletic Track Pants: These track pants are designed for athletic activities and sports but have gained popularity as a fashionable casual wear option as well. They usually have a looser fit and are made of breathable materials like moisture-wicking polyester or blends. They might feature side stripes, contrasting panels, or logo branding.