SKU: 76397382747

Nishikawa Japan Air Si Semi-Single King Size Mattress | Advanced Cushioning

Sale price$650.48 Regular price$722.76
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Ships within 48 hours · Estimated delivery Aug 18 - Aug 23

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Description

Nishikawa Japan Air Si Semi-Single King Size Mattress | Advanced CushioningDescription Experience unparalleled comfort and support with the Nishikawa Japan Air Si Semi Single King Size Mattress. Designed with advanced cushioning technology, this mattress offers a restful and rejuvenating sleep experience, ideal for those who value both softness and support. Featuring a unique three dimensional cross slit structure and high resilience cushioning, the mattress adapts to your body's contours, promoting proper spinal alignment.

Description

Experience unparalleled comfort and support with the Nishikawa Japan Air Si Semi-Single King Size Mattress. Designed with advanced cushioning technology, this mattress offers a restful and rejuvenating sleep experience, ideal for those who value both softness and support.

Featuring a unique three-dimensional cross slit structure and high resilience cushioning, the mattress adapts to your body's contours, promoting proper spinal alignment. Its innovative air-flow system helps maintain a consistent core temperature, ensuring you stay comfortable throughout the night.

Details

• Product Material: High resilience cushioning materials and advanced air-flow components

• Manufacturer: Nishikawa Japan

Features

  • Advanced three-dimensional cross slit structure for superior support
  • High resilience cushioning for enhanced comfort
  • Unique air-flow system to maintain even core temperature
  • Semi-single king size design accommodates two people comfortably

How to use

Place the mattress on a flat, sturdy bed frame to ensure optimum support. Allow the mattress to air out for a few hours before first use to maximize comfort. Rotate the mattress periodically to maintain even wear and prolong its lifespan.

Care instructions

Keep the mattress dry and avoid exposing it to direct sunlight for extended periods. Use a mattress protector to prevent stains and dust accumulation. Clean spills immediately with a damp cloth and mild detergent, avoiding harsh chemicals. Regularly air out the mattress to maintain freshness and prevent moisture buildup.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 76397382747

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4.1 ★★★★★
Based on 22 reviews
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Verified Purchase
Rob Tilka
San Leandro, US
★★★★★ 4
Just have to be careful not to take more than one per night or else wake up feeling like have a hangover
Size: 200 Count (Pack of 1)
Definitely works for me. Just have to be careful not to take more than one per night or else wake up feeling like have a hangover. Works great for me but not as well for my stepmother. She has severe insomnia and has been on sleeping medications for years. She tried taking this to go a more natural route but did not even affect her.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 9, 2018
P
Verified Purchase
Patricia Dodd
Carnegie, US
★★★★★ 5
surprised!
I actually didn't realize I had ordered "time released" version. I thought these were just normal melatonin. But now that I've tried these, I love them so much better than the regular version! Helps me sleep better through the night. No taste, love this brand of Source Naturals.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 17, 2025
C
Verified Purchase
ChelaTho813
Birmingham, US
★★★★★ 5
The only one I'll use!
As the title says, this is the brand to get!! It's fast-acting, doesn't give me weird dreams like some do, and I never wake up feeling groggy.
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Reviewed in the United States on March 13, 2025
B
Verified Purchase
Belle of the Ball
Boise, US
★★★★★ 5
Works wonders
I've been buying these for well over a year now as Subscribe and Save. I work 12 hour overnights as a nurse. My sleep schedule normally gets messed up. I would have no problem falling asleep but would wake up only a few hours later which is not good when you have work again that night. We buy these on Amazon due to the great price and the fact that they are extended release which helps keep me asleep longer. When I take 1 or 2 of them, I am able to sleep about 7-8 hours which is great. I take this both when I sleep during the day and sleep during the night. It helps me sleep no matter when and I am able to adjust my sleep schedule often. I have recommended them to many.
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Reviewed in the United States on January 10, 2013
P
Verified Purchase
PSBone
Birmingham, US
★★★★★ 4
Works quite well, dose still a bit high for me
Used to take the Natrol 5mg slow release, now that I can compare these 2, I love this more. It doesn't make me feel too edgy, it's quite relaxing actually. I still have to halve the dose as the full dose makes me groggy the next day. Where the Natrol gave me very vivid, but not unpleasant dreams, these don't make me dream as vividly. It does take a bit longer to get me to sleep, but once asleep, your asleep. Highly recommend, once I finish this bottle, I'd get the 2mg tr next time, as a lower dose works better for me.
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Reviewed in the United States on July 10, 2014

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