Threadmill Supima King Size Sheets 1200 Thread Count - Hotel Softness

In this review we look closely at the Threadmill Supima King Size Sheets, a 4 piece set built around an authentic 1200 thread count Supima cotton sateen. The bottom line: these sheets suit someone who wants a luxurious, hotel-like feel and durable daily use rather than a bargain basic. The set delivers a velvety, substantial hand and good breathability from the Supima yarns, and the deep-pocket fitted sheet is the single biggest reason to choose this set if you struggle with fitted sheets that come loose.

Key Features

• 1200 thread count: Provides a dense, smooth surface that reads as soft and substantial against the skin for a more refined sleep experience.
• 100% Supima cotton: Uses long staple American Supima yarns for improved softness and strength that resist pilling over time.
• Sateen weave: Gives a natural sheen and breathable drape, making the sheets comfortable across seasons.
• Extra deep pocket fitted sheet: The fitted sheet measures 78in x 80in with a 17in deep pocket and all-around elastic to stay snug on deeper mattresses.
• 4 piece set: Includes 1 flat sheet (110in x 104in) and 2 king pillowcases (20in x 40in), giving complete bed coverage for a king mattress.
• Certified and sustainable: OEKO-TEX certified and made in a wind and solar powered factory, packaged in a reusable cotton tote.

Who It's For

These sheets are best for sleepers who prioritize a premium feel and longevity: people who want a 5 star hotel style finish at home, couples who appreciate a heavier, silky hand, and owners of deep mattresses who need a reliable fitted sheet. They also fit shoppers looking for certified, more sustainable bedding choices.

Those who should look elsewhere include buyers who prefer very lightweight, crisp percale or those on a tight budget who feel a high thread count must be inexpensive. Also check pillowcase dimensions if you use unusually oversized or decorative pillows, as some customers reported fit differences.

Pros & Cons

Pros

• Luxuriously soft and smooth feel from the Supima cotton and high thread count.
• Deep-pocket fitted sheet with full elastic keeps the sheet in place on thicker mattresses.
• Durable construction and resistance to pilling when laundered per instructions.
• Environmentally conscious production and OEKO-TEX certification provide added assurance.

Cons

• Some customers find the set pricey relative to expectations about value for money.
• Pillowcase fit received mixed feedback from users with nonstandard pillow sizes.

Specifications

Set contents	1 flat sheet, 1 fitted sheet, 2 king pillowcases
Flat sheet size	110in x 104in
Fitted sheet size	78in x 80in with 17in deep pocket
Pillowcase size	20in x 40in (king)
Material	100% American Supima cotton
Weave	Premium sateen
Certification	OEKO-TEX; manufactured in wind and solar powered factory

Our Verdict

The Threadmill Supima king sheet set is a solid pick for anyone seeking a luxury hotel feel at home and a fitted sheet that actually fits deep mattresses. While some shoppers may question the price, the combination of Supima yarn, sateen finish, and durable construction makes these sheets a worthwhile long-term bedding upgrade for those who value comfort and sustainability.

Frequently Asked Questions

Do these sheets fit deep mattresses?
The fitted sheet has a 17in deep pocket and all-around elastic, which fits most deep mattresses securely.

What material are the sheets made from?
They are woven from 100% American Supima cotton with a sateen weave for a smooth, soft finish.

How should I wash them to avoid shrinkage?
Machine wash at room temperature and fold right after drying to minimize shrinkage and reduce wrinkles.