For a look that offers function and fashion, try teaming a white and brown long sleeve shirt with chinos. Take this outfit in a more informal direction by finishing with white leather low top sneakers. This one is a good-looking and mature combo for men in their 20s.
Teaming a white and brown long sleeve shirt and chinos will be a good illustration of your skills in men's fashion even on lazy days. On the footwear front, this look is completed nicely with dark brown suede desert boots. A reliable option getup appropriate for 20-year-old men who prefer more polished combos.