The answer is yes; you can wear Vans with sweatpants. However, a few things to keep in mind when putting together outfits with vans shoes. For starters, sweatpants are for casual wear. You can wear them with other casual clothes like t-shirts or hoodies. Secondly, the outfits with Vans and sweatpants should be relatively simple and minimalistic. You don't want your outfits to appear sloppy or haphazardly thrown together. Thirdly, if you're wearing sneakers with sweatpants, make sure that the sneakers are appropriate for the occasion. For example, don't wear high-top sneakers with too big sweatpants. Opt for a pair of low-profile vans instead, like the Old Skool or the Authentic.