About NANGA products function and construction



About Functionality

Introducing the functionality that integrates
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. Drawstring

By using the locking drawstring it is possible to adjust temperature and fit.

02. Shoulder warmer

Insulating material in the shoulder area prevents warm air from escaping. Equipped primarily on 3 and 4 season sleeping bags.

03. Draft tube

Internal tube blocks cold air from coming in through the gaps in the zipper, preserving warmth. Equipped primarily on 3 and 4 season sleeping bags, same as the shoulder warmer.

04. Zipper

Equipped with YKK5C. Considered to be the optimal zipper for sleeping bags based on strength testing by YKK.

05. Sizing

The regular size has a max length of 210cm and a max width of 80cm, making for a comfortable bag. We also offer long and short versions.



About Product Construction

The 3 quilting structures used by NANGA.
We leverage a deep understanding of the strengths of each type to identify the optimal application for each product.
The 3 quilting structures used by NANGA

This sleeping bag features a new level of technology, with a trapezoid box baffle structure and solid structure which maximizes the full potential of down, and allows stress-free and efficient heat retention no matter what position you sleep in. By narrowing the feet area, we have successfully reduced weight.

Single quilt construction
Single quilt construction

This method is very simple and minimizes weight. The inside and outside layers are directly sewn together for lightweight and compact construction. This construction is used for summer bags.

Box quilt construction
Box quilt construction

This is the most efficient method for optimizing the insulating quality of down. A breathable mesh is layered between the inside and outside layers, and is equipped with crosswise boxes to prevent clumping to one side.

Trapezoidal box construction
Trapezoidal box construction

Boxes support each other in this construction; this maximizes the down's "loft," and efficiently insulates by minimizing clumping and heat release.



About Materials for The Product

The materials used by NANGA

Nylon material with waterproof porous polyurethane coating. This advanced material solves the problem of decreased breathability associated with waterproofing. The two-layer material has a high level of waterproofing / breathability at 20,000mm and a breathability of 6,000g / m2 / 24hrs


It is among the most lightweight of synthetic fibers, and offers elasticity and frictional strength. Dirt easily comes off of this smooth surface, making it easy to care for; it is minimally absorbent so it dries quickly even if it gets wet. It is compatible with many compounds, and can be used with water repellent or breathable waterproofing coatings.

* Denier A unit of fiber density. 1 Denier(dn) = a fiber with a weight of 1g at a length of 9,000m The higher the Deniers, the thicker the fiber; materials using thicker fibers are more durable.