The troy lee terrain shorts come equipped with a breathable mesh short liner the new air 20 liner this chamois pad features perforated foam and moisture wicking fabric so you get comfort and airflow for long ride comfort the water resistant fabric offers protection from mud splashes and light showers while mesh fabric built into thighs allows air in to keep you cool and dry on warmer days and on long climbs where youll build up a sweat a great all rounder the terrain shorts you can