There are some fashion items that are so rudimentary that I can never remember to buy them, and when I really need them and tell myself to order them, I forget as soon as I see a bright, shiny object to order instead. Know what I mean? In this case, the thing I always forget to buy but always need (this time of year especially) is long-sleeve T-shirts—both solid and striped. The ones I wear the most usually have a crew-neck, and I find that owning a combination of fitted and oversize ones will do you the most service.

My observation is that long-sleeve T-shirts often get overshadowed by short-sleeve tees, sweatshirts, and sweaters.

But when you need to layer or when you need something that's not too warm but not too light, your best bet is a long-sleeve tee. In case you need to be reminded just how essential they are to an outfit, I found a whole slew of examples for you. And in case you need to stock up on them, I'm sharing 16 of my current favorites, most of which are under $100. Scroll to be convinced.

Style Notes: When shopping for striped tees, go for an oversize one for the most current look.

Style Notes: For ballerina vibes, opt for a scoop-neck second-skin tee.

Style Notes: When your bottoms are loose, it's always a good idea to pair them with a slim tee (and vise versa).

Style Notes: Shorts and a long-sleeve tee will always be a go-to early fall outfit combo.

Style Notes: A cream-colored tee looks especially chic with checked trousers.

Style Notes: Striped tees are great with jeans but even better with leather pants.

Style Notes: Stock up on close-fitting tees for layering.

Style Notes: Just another great example of slim on the bottom, loose on top.

Style Notes: Want a tee that's a bit more dressed up?

Get yourself one with shoulder pads.

Style Notes: Neutrals are great, but having a couple of colorful ones on hand is also recommended.

Style Notes: Never underestimate the power of a cool neckline.

The perfect place to start.

Everlane will always be an amazing source for excellent affordable tees.

This cool-girl brand is a favorite of celebrities for a reason.

Sometimes the basic is also the standout piece.

Skims fitted tees are cult favorites for a reason.

Switch it up with this shade of olive green.

This ultra-soft tee is one you'll want to buy in bulk.

Don't sleep on Lululemon tees (but feel free to sleep in them).

This looks so comfortable.

I've seen this all over my TikTok feed.

I always like to have some cropped options on hand.

This one feels so fashion.

You can never go wrong with a Leset tee.

It's wise to have super-fitted tees on hand for layering purposes.

The cut on this is so cool.

Another fitted tee that people love.

This cozy, casual tee is 50% off right now.

This story was published at an earlier date and has since been updated.