The open, highly breathable knit and feathery weight of Patagonia's Capilene 3 Midweight Bottoms for Boys affords unhindered airflow, excellent wicking for endurance activities in moderate to cold temperatures and it's Patagonia's fastest-drying Capilene. Because of its low-bulk design and streamlined fit, Capilene 3 also acts an excellent layering piece during colder weather. Made of quick-wicking, fast-drying 54% post-consumer recycled (and 100% recyclable) Capilene 3 polyester, with Gladiodornatural odor control.