Option #1: Boxercraft Harley Flannel Pant (Youth, Men, Women)

About this product
When the chill hits the air, grab hold of these all-cotton flannel pants. Double-brushed for super softness (inside and out). You can adjust the fit with a coordinating tie at the waist.
Comes in youth, women, and men sizes. 
 
4.3 oz.,
100% cotton flannel
Self-folded waistband Functional fly
Machine wash cold; tumble dry low