I use a silk cap and a silk pillowcase (because one can never overdo it, haha), and yep, second day hair every time. The silk seems to not only prevent frizz, but also reduces any leftover from the previous day. I always have less frizz in the morning.

As a decent alternative, the Stay-on Satin bonnets you can get at Walmart aren't bad. Not as good as silk, but they're cheaper. If you want a really nice silk bonnet, Blensblend has them in different lengths and the silk is very good quality. Pretty Antoinett's also has nice bonnets.
3a/b, F, normal porosity

Suave conditioner, LAL gel