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by IWATA Inc.

Premium Throw Blanket with a Snap

The “Premium-Warmer” is designed to suppress heat dissipation from the area to keep your body warm and its unique sewing method provides comforts to gently wrap your shoulder, waist, and lap.

The idea of warming without putting a strain on the body.

Based on Iwata’s long years of research on natural feathers, the “Premium Warmer” was born from the idea of warming without putting a strain on the body. Instead of applying external heat to warm the body, the product is designed to retain the natural thermal energy of the human body. As the natural warmth retained with feathers does not put an excessive burden on the body, you can wear them stress-free for a long time. Moreover, the excellent natural breathing function of feathers prevents moisture accumulation by absorption.

Why is natural warmth so comfortable?

The body part where people feel cold is different and not necessarily just one part. The troubles of cold sensitivity are remarkable in winter, but even in summer, our body may get chilled due to air conditioning, countermeasures against cold troubles are so required regardless of the season in order to spend a comfortable daily life. Disposable heat packs and electric blankets are widely used as countermeasures to cold troubles, but such active heat devices sometimes warm the body excessively high. On the other hand, the retention of natural body temperature with feathers does not involve external heat, thus the body temperature does not rise more than necessary. Besides, feathers absorb moisture released from the human body but also exhale to outside with their excellent breathing function, so they do not get moisty. The “Premium Warmer” keeps the body warm and controls the moisture naturally providing you with wearing comforts.

Always hygienically clean as it can be washed

The “Premium Warmer” can be water-washed easily at home. After washing and spin-dry, just hang it to dry. As it can be dried in the sun, you can always keep it hygienically clean.

Based on sleep science.

Sleep allows our immune systems to build and is a crucial time for our bodies and minds to recover from stress and fatigue. The bedding should not only be comfortable but should also be functional to support good sleep. We have researched sleep, from the mechanisms of the body, position in bed, the frequency of rolling over, to temperature and humidity, all factors informing our product development. As we spend a third of our lives in bed, we owe it to ourselves to ensure that time is as comfortable as possible - our physical and mental well being depend upon it.

Hypoallergenic and chemical-free

Using a process developed in the IWATA lab, Iozone (Ion + Ozone) ensures that allergy causing spores, dust mites, etc. are eliminated, for a completely safe, hypoallergenic pillow.

Artisan-level professionals

IWATA's products are manufactured in Japan using carefully selected, rigorously tested, top-quality materials and tools. Skilled professionals create every product with the utmost care and attention to detail, individually cutting each section of fabric before sewing using lock-stitch machines.

World’s leading sleep specialists

Over the 180 years, IWATA Inc. has been creating bedding, the company has developed and patented innovations in many areas such as down purification, fiber activation, and manufacturing optimization. Pioneers in the field of ‘sleep’ research, the company's unique technical know-how is reflected in its simple, efficient and ecological designs.

International standards

Eco-Tex is an international testing and certification system for screening harmful substances in textile products. Each IWATA product carries Eco-Tex certification. From fill materials to shell fabrics, threads to fasteners, every component is tested for purity and safety.

Stringent in-house standards

While IWATA Inc. is certified ISO9001 (international quality management system) at both its factories and laboratory, the company’s own stringent quality control enables them to confidently use completely natural materials and chemical free, natural processing to create safe, reliable, high-performance bedding.

Product Details

零售商 Japan


  • Material:
    Fill: France Pyrenees Silver Goose Down 95%
    Shell: cotton satin 100%

  • Sizes: 55X130cm (W21.7inxH51in)
  • Weight : 315g (0.7oz)
备注 Size cannot be adjusted. Please check the size before purchase.

・All the products handling in ALEXCIOUS are the genuine products from the original makers.
・The colors in the product photos may differ slightly from the actual product.
・The design, specifications, appearance, and price of products are subject to change without notice.

Throw Blanket (Down)

SKU: I004-3039-01


¥ 24,762
转换为其他货币 USD 164.80


¥ 5,200
(转换为其他货币 USD 34.61)
Gift wrapping available
  • I004-3039-01

    ¥ 24,762
    日本国内配送: 6-7个工作日送达
    海外配送: It takes a few more days.

Contact us


Guide for Ordering Procedures

Order Procedures

  1. 1
    Placing an Order

    Orders can be made anytime.

  2. 2
    Confirmation Mail

    An automated mail will be delivered from ALEXCIOUS after an order has been placed.

  3. 3
    Approximate Shipping Date Mail

    For products that may take up to more than the period of notation to dispatch, another mail will be sent to notify the approximate shipping date in 1-3 business days

  4. 4
    Shipment Confirmation Mail

    A confirmation mail will be sent with the voucher number that indicates that the product has been shipped.

  5. 5
    Arrival of the Product

    After the order has been delivered, we request that you kindly rate our product on the review page.

Delivery and Wrapping

Shipping Method Delivery within Japan: Sagawa Express, Delivery Overseas: Express Mail Service (EMS) via the Japan Post Service
¥ 1,100
Estimated Delivery Date
Domestic delivery usually takes 1-3 days after the order is shipped.
For international delivery, delivery time can be estimated based on that of EMS (International Express Mail Service) once the order is shipped.Check the delivery time here.
Ship from Shinagawa-ku, Tokyo
Sagawa Express Tracking Info Site
EMS Tracking Info Site
Insurance Included
Wrapping Message card (+ 110JPY / texts can be personalized) and gift wrapping (+ 550JPY) options are available. (Gift wrapping materials may be different from the image due to the size or shape of the product.)

Payment Method

Customers inside Japan
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Cash-on-delivery (COD)

(For domestic shipping and wristwatch purchases only)
For those who would like to pay via cash-on-delivery (COD), please select the ATM option. Then, please specify the COD option and the desired date of delivery (excluding weekends, the date can be no sooner than 4 days after the order) on the information form below. Cash-on-delivery Option/ Service Fees

Less than JPY 10,000
JPY 300
JPY 10,000 or above ~ less than JPY 30,000
JPY 400
JPY 30,000 or above ~ less than JPY 100,000
JPY 600
JPY 100,000 or above ~ less than JPY 300,000
JPY 1000
Customers outside Japan
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Kindly notes If you view our site in Japanese, you may choose any one of the payment methods above. If you view our site in other languages including English, you may only make your payment with Square or PayPal.