No, twin XL beds are 5 inches longer than twin beds (80 inches versus 75). You won't be able to stretch twin sheets over the extra-long mattress. 

Both twin and twin XL beds have the same width, 39 inches. While you could theoretically fit the best twin XL sheets on a regular twin bed, you'd have a lot of excess fabric to tuck under the mattress.

It's hard to go wrong with cotton sheets. They're soft, durable, and easy to clean. 

If you like a lighter, crisper feel, look for percale weaves. For denser sheets with a sheen, you may prefer sateen. Flannel sheets are made of cotton and are cozy and warm. 

For other fabric options, we love linen sheets in warm weather. But they are pricey and wrinkle easily.

Twin XL mattresses are 80 inches long and 39 inches wide. Twin XL mattresses comfortably fit a single sleeper up to six and a half feet tall. They are the same length as queen and king size mattresses. Many college dorms will use twin XL beds; they are also popular options for couples who want to create a split-king size bed. 

You'll want to double-check the measurements of your dorm bed, but most twin XL sheets are 80 by 39 inches, but the pocket depth can vary. If you bring a mattress topper, you'll want to get sheets with roomier pockets to accommodate it.