Octane Mid Rise Straight Leg Crop Jeans with Lightly Frayed Uneven Hem Detail. Octane has a very Unique Hemline, with a Lightly Worn Front Hem, and Lightly Frayed Hem in the Back without the Stitched Seam. Medium Washed Denim, 94% Cotton, 5% Polyester, 1% Spandex, Available in 0/24, 1/25, 3/26, 5/27, 7/28, 9/29, 11/30, 13/31, and 15/32.