NANGA's Product Features



Product Features

Introducing features that integrate
NANGA's technology and philosophy

NANGA specializes in using high-quality down and manufacturing our products in Japan. We rigorously select only down that is imported from Europe and washed in Japan. Naturally it is free of any impurities, and there is almost no trace of that distinctive down smell. A sophisticated refining process is necessary to maximize the potential of the characteristics of down. The quality of Japan's purification process is second to none when compared to other countries. Our products are sewn in Japan by only the most skilled artisans.

01. Drawstrings

The drawstrings feature cord locks to help adjust the temperature and fit of the sleeping bag.

02. Shoulder warmer

A tube filled with insulating material in the shoulder area prevents warm air from escaping. The shoulder warmer is equipped primarily on sleeping bags rated for three seasons or more.

03. Draft tube

The internal tube blocks cold air from coming in through the gaps in the zipper and improves thermal insulation. As with the shoulder warmer, the draft tube is featured primarily on sleeping bags rated for three seasons or more.

04. Zipper

Equipped with YKK 5C, which is considered to be the optimal zipper for sleeping bags based on strength testing by YKK.

05. Sizing

The regular size has a maximum length of 210 cm and a maximum width of 80 cm, making for a comfortable and roomy bag. Long and short versions are also available.



Product Construction

NANGA uses three types of baffle structures.
Our expert knowledge of the beneficial qualities of each baffle type allows us to apply the optimal structure to each product.
The 3 quilting structures used by NANGA

Constructed with trapezoidal box baffles and three-dimensional structures to maximize the full potential of down, our sleeping bags feature a new level of technology that allows stress-free and efficient heat retention regardless of your sleep position. We have also reduced the weight of the bags by tapering the bag toward the foot area.

Sewn-Through Baffle Construction
Sewn-Through Baffle Construction

This stitching method is very simple and minimizes weight. The outer shell and lining are sewn directly together to achieve lightweight and compact construction. This technique is often used for summer sleeping bags.

Box Baffle Construction
Box Baffle Construction

This is the most efficient method for optimizing the insulating quality of down. Breathable mesh walls are sewn between the outer shell and lining to create the box structure, and these compartments are placed horizontally and vertically to prevent the down from clumping and shifting.

Trapezoid Box Baffle Construction
Trapezoid Box Baffle Construction

Each of the boxed baffles supports each other and enables the down to loft to its full potential while also preventing the down feathersfrom clumping and causing heat loss. In this way, the trapezoidal box structure contributes to efficient heat retention.



Product Materials

Introducing the materials used for NANGA's products

AURORA-TEX® is a nylon material with porous polyurethane waterproof coating. The advanced technology applied to this material solves the problem of decreased breathability associated with enhanced waterproofing. The two-layer material has a high level of waterproofness and breathability with a hydrostatic head of 20,000 mm and a moisture vapor transmission rate of 6,000 g/m²/24 hrs.


Nylon is among the most lightweight of synthetic fibers and offers elasticity as well as frictional strength. Its smooth surface is resistant to wrinkles and allows for easy maintenance as dirt can be easily removed. It is also minimally absorbent, so it dries quickly even if it gets wet. Moreover, nylon works well with other finishing agents and is highly compatible with water-repelling or breathable waterproofing coatings.

* Denier is a unit of measurement to determine the thickness of a fiber. One denier (dn) is equivalent to a thread with a weight of 1 gram at a length of 9,000 meters. The higher the denier count, the thicker the fiber; as such, materials using thicker fibers are more durable.