Photo via: Glamour UK
If anyone is going to make sweatpants look chic it'd be Sienna Miller. With a classic ribbed knit, black duffle bag and red flats this is great inspiration for weekend casual.
Get the look:
+ Lafayette 148 New York Merino-Cashmere Ribbed Sweater
+ Madewell The Glasgow Satchel
+ Stateside Sweatpants
+ NSF Destroyed Sweatpants
+ Sam Edelman Felicia Ballet Flats