Mellanni Extra Deep Twin XL Sheets - 3 PC Iconic Collection Bedding, Hotel Luxury, Ultra Soft, Cooling Bed She Review (2026)

Who should buy this set

This set is built for Twin XL beds, the longer mattress size common in dorm rooms and adjustable bed bases, which makes it a natural fit for tall students or tall single sleepers who need the extra length a standard twin does not offer. The Iconic Collection's extra-deep pocket construction adds another layer of usefulness for anyone stacking a mattress topper on a dorm bed or using a thicker Twin XL mattress at home. Buyers with a standard-depth Twin XL mattress and no topper do not need the extra-deep version and can save money with a standard-depth Twin XL set instead. Anyone who needs more than one pillowcase should note this set only includes one, discussed further below.

What is included

The 3-piece Twin XL set includes one flat sheet, one fitted sheet, and one pillowcase, which matches the single-pillow setup typical of a Twin XL bed rather than the two-pillowcase count found in larger sheet sets. That single pillowcase is standard for Twin XL sets generally, since the bed size is built for one sleeper, but buyers who like to use two pillows or want a spare for laundry day will need to purchase an additional pillowcase separately to match. The fitted sheet uses a sewn-in elastic band around the perimeter designed to keep it snug on the mattress corners rather than popping loose overnight.

Material and feel

The sheets are brushed microfiber, OEKO-TEX Standard 100 certified, meaning the fabric has been independently tested for a long list of harmful substances rather than relying only on the brand's own claims. Microfiber at this quality tends to feel smooth and resists wrinkling well, which matters for dorm use where ironing is rarely practical. As with other microfiber sheets, it will generally sleep warmer than a breathable cotton percale, which is worth factoring in for a dorm room that may already run warm, or for a tall sleeper whose larger body surface area increases how noticeable that heat retention feels overnight.

Fit for thick mattresses

The fitted sheet is built to fit mattresses up to around 21 inches deep, which covers most Twin XL mattresses paired with a memory foam topper, a common setup in dorm rooms where the base mattress can be thin. That deep pocket combined with the sewn-in elastic band is meant to keep the sheet from sliding off during regular use, which is a frequent complaint with cheaper Twin XL sheets that only have elastic at the four corners rather than running the full perimeter. Measuring the exact mattress-plus-topper height before ordering is still the safest way to confirm a proper fit for unusually thick setups.

Value and alternatives

For a 3-piece extra-deep Twin XL set with OEKO-TEX certification, the price is reasonable within the microfiber sheet category, and the Iconic Collection has been recognized multiple times in Good Housekeeping's bedding awards. Buyers who want two pillowcases without buying a spare separately should compare against other Twin XL sets that include an extra pillowcase by default. Those who prioritize a natural cotton feel over microfiber's smoother, warmer characteristics may prefer an extra-deep cotton Twin XL set instead, typically at a higher price point. For tall students needing a secure fit on a topped Twin XL mattress, this set is a solid mid-range value.

Frequently asked questions