1, cost-effective, compared with Bosideng and Hongdou brands, Heyidan has a favorable price.
2. High thermal insulation performance. And the down fibers of Yidan down jacket are hollow tubes with thin walls. A large number of down fibers gather into a solid shape, forming a layer of heat insulation and cold-proof net, so cold air is not easy to invade the human body, so it has high thermal insulation performance.