The Park Twill Pant in Denim from Knickerbocker, NYC. 

Details
The Park Pant Is A Summer Staple At Knickerbocker. It Features A Single Pleat Front, An Elasticated Waist And An Extra-Wide Leg Opening—Adding To The Ease Of This Silhouette And Making It One Of The Favorites For The Warmer Months. The Unique Blend Of Cotton And Linen In A Rope-Dyed Indigo Twill Offers Structure Without Sacrificing Breathability Or Durability.

• 60% linen, 40% cotton twill with a single rinse finish, woven in Japan
• Urea buttons
• Made in Portugal