Ebay offers Adidas Men's Essentials 3-Stripes Open Hem Fleece Pants for $13 (reg $50). Free shipping with Prime or on orders over $25.

Product Description:
No matter what the day has in store, these adidas pants keep you comfortable throughout. The soft fleece build and open hems provide a cozy, relaxed feel. Classic 3-Stripes down the legs offer a sporty finish.