Threadmill Supima 1000 Thread Count Cal King Sheets - Luxurious Sateen

Our review of the Threadmill Supima 1000 thread count California King sheet set finds it best suited to anyone who wants hotel-style softness and a durable, breathable cotton set for year-round use. The single biggest reason to buy is the 100% Supima cotton yarn and premium sateen weave, which produce a velvety hand and natural sheen that improve with washing. These sheets feel noticeably thicker than typical cotton sets, and the elasticized deep pocket fitted sheet is designed to stay put on taller mattresses.

Key Features

• 100% Supima Cotton: Uses extra long staple Supima yarns for superior softness and long-term durability compared with ordinary cotton.
• 1000 Thread Count Sateen: A high thread count and sateen weave deliver a smooth, slightly lustrous finish that is comfortable in all seasons.
• Deep Pocket Fitted Sheet: The fitted sheet measures 72" W x 84" L with a 17" deep pocket and all-around elastic to fit thick mattresses without bunching.
• Four Piece Set: Includes 1 flat sheet, 1 fitted sheet, and 2 king pillowcases sized for California King bedding needs.
• OEKO-TEX Certified and Sustainable: Manufactured with wind and solar energy, free from harmful chemicals, and packed in a reusable cotton tote.
• Easy Care: Machine wash at room temperature and fold promptly to avoid shrinkage and reduce wrinkles for straightforward maintenance.

Who It's For

This set is ideal for sleepers who prioritize a hotel-like feel and want long-lasting, naturally soft cotton that breathes in warm or cool weather. Couples or individuals with thick California King mattresses will appreciate the 17" deep pocket fitted sheet and the snug all-around elastic that helps prevent slippage.

Shoppers who need exacting size tolerance or prefer crisp percale may want to compare measurements carefully before purchase, since a few customers reported mixed fit experiences where the fitted sheet or top sheet felt smaller than expected. Those seeking wrinkle-free performance straight out of the dryer should plan to fold right away or lightly press.

Pros & Cons

Pros

• Very soft and improves with each wash, delivering a luxe, velvety feel.
• Thicker, substantial fabric that feels durable and comfortable year-round.
• Deep pocket fitted sheet with all-around elastic for better fit on taller mattresses.
• Environmentally conscious production and OEKO-TEX certification.

Cons

• Some customers report mixed sizing fit issues, so the top sheet or fitted sheet may not match every mattress perfectly.
• High thread count sateen can show wrinkles if not folded or smoothed promptly after washing.

Specifications

Brand	Threadmill
Material	100% Supima Cotton
Weave	Sateen, 1000 thread count
Set Contents	1 flat sheet, 1 fitted sheet, 2 king pillowcases
Fitted Sheet Size	72 in W x 84 in L with 17 in deep pocket and all-around elastic
Flat Sheet Size	108 in W x 102 in L
Certifications	OEKO-TEX; made in wind and solar energy powered factory

Our Verdict

The Threadmill Supima 1000 thread count Cal King set is a strong choice for anyone seeking a plush, long-lasting cotton sheet with a hotel-quality feel and substantial fabric. It represents good value for sleepers who want softness that improves with washing and a deep-pocket fitted sheet for thicker mattresses, though careful attention to measurements is advised for the best fit.

Frequently Asked Questions

Are these sheets truly 100% Supima cotton?
Yes, the set is made from 100% extra long staple Supima cotton yarns for enhanced softness and durability.

Will the fitted sheet fit a deep mattress?
The fitted sheet has a 17 in deep pocket and all-around elastic designed to accommodate thicker California King mattresses, though some users reported mixed fit results.

How should I care for these sheets to avoid shrinkage?
Machine wash at room temperature and fold promptly after drying to reduce shrinkage and prevent excess wrinkles.