Cocoonfit Silk & Cotton Hietori Warming Layering Socks 4-Pair Set | Warm Sleep Socks | Made in Japan

Japanese Hietori Wellness: Cocoonfit Silk & Cotton Hietori Layering Socks (4-Pair Set)

Cold hands and feet keeping you up on winter nights? Hietori (冷えとり) is a long-loved Japanese wellness practice built on the idea of keeping the head cool and the feet warm, by layering silk and natural-fibre socks. Cocoonfit (コクーンフィット), the silk brand of established Japanese sock maker Sunayama Socks, brings the practice together in one ready-to-wear set of four pairs.

Four Key Features

Alternating Silk and Cotton Layers:
Pairs 1 and 3 are silk, which absorbs and releases moisture well. Pairs 2 and 4 are pure cotton, which takes up moisture passed on from the silk layers, helping feet stay dry and less stuffy.

Layers of Air for Natural Warmth:
Air trapped between the four layers holds warmth better than a single thick sock, making the set especially comfortable for sleeping in cold weather.

Relaxed, Non-Binding Cuffs:
Every pair has a soft, roomy cuff, so even all four layers together won't dig into your legs. Comfortable to wear all night.

Made in Japan with Natural Fibres:
The whole set is made in Japan, with silk next to the skin for a smooth, gentle feel.

How to Wear (Hietori Layering)

Put them on in order: pair 1 silk → pair 2 cotton → pair 3 silk → pair 4 cotton. Beginners can start with the first two pairs and add layers gradually.

Size Guide:

Size S: 23–25 cm
Size L: 25–27 cm

Product Specifications:

Brand / Manufacturer: Cocoonfit (Sunayama Socks Co., Ltd., Japan)
Product Name: シルクとコットンの冷えとりソックス4足セット
Product Type: Hietori layering sock set (4 pairs)
Materials: Pair 1: silk 99%, other fibres 1%
Pair 2: cotton 100%
Pair 3: silk 95%, other fibres 5%
Pair 4: cotton 100%
Colours: Silk socks off-white / cotton socks beige
Available Sizes: S (23–25 cm), L (25–27 cm)
Country of Origin: Made in Japan

*Note: This product is everyday warm clothing, not a medical product, and is not intended to diagnose, treat or prevent any disease. Silk is a natural fibre: hand wash in cold water or machine wash gently in a laundry bag. Do not bleach, tumble dry or dry in direct sunlight.