For those searching for a "40" size in apparel, the M4 series is Ariat's most popular work jean, known for its "mature" or relaxed fit that doesn't sacrifice toughness.

. Both items are designed for rugged durability and "mature" performance in demanding environments like ranching or construction. The Ariat AR-40 VentTEK Western Boot

This boot is often described as "air conditioning for your feet," specifically engineered for extreme heat and long work hours.

While there is no single product officially named "Ariate Mature 40," your search likely refers to (specifically in a size 40 waist ) or the Ariat AR-40 VentTEK boots Go to product viewer dialog for this item.

: Features integrated VentTEK™ mesh panels and a high-tech Dri-Freeze™ lining to maximize airflow from the toe to the calf.

: Includes no-rub comfort inseams to reduce chafing, making them ideal for long days in the saddle or on your feet.

: Built on a Bantamweight™ sole , which offers maximum flexibility and durability without the heavy bulk of traditional western boots.