THESE TRACK PANTS ARE MADE FROM 100% ORGANIC COTTON AND DESIGNED TO BE WORN ALL-YEAR-ROUND. THEY’RE MADE FROM A MEDIUM-WEIGHT FABRIC, WITH A LOOP BACK TEXTURE INSIDE AND A FINISHING THAT PROVIDES EXTRA SOFTNESS.OUR CHESTNUT BROWN IS A DARK REDDISH-BROWN THAT TAKES ITS NAME FROM THE NUT OF THE CHESTNUT TREE THAT INSPIRED IT.