Here are a few options for the WordPress post_tag description, catering to different needs and styles:

**Option 1: Simple & Direct**

* **Description:** 各种羽絨外套，保暖舒适的选择。 (Various down jackets, a warm and comfortable choice.)
* **Use Case:** Great for general tagging and quickly indicating content related to down jackets.

**Option 2: Focus on Features**

* **Description:** 精选羽絨外套，提供优质保暖、轻便透气的功能。 (Selected down jackets, providing high-quality warmth, lightness and breathability.)
* **Use Case:** Suitable for posts showcasing the benefits of down jackets, mentioning key features.

**Option 3: Including related keywords**

* **Description:** 关于羽絨外套、蓬松外套、禦寒外套，挑选羽绒衣的指南与评测。 (Regarding down jackets, puff jackets, winter coats, guides and reviews for choosing down clothing.)
* **Use Case:** Beneficial if you have a very related content that wants to be surfaced to users who have the same interests.

**Option 4: More Descriptive**

* **Description:** 探索一系列羽絨外套，包括不同款式、颜色和保暖程度。 了解如何选择最适合您的寒冷天气的羽絨外套，从休闲款到专业户外款一应俱全。 (Explore a collection of down jackets, including various styles, colors, and warmth levels. Learn how to choose the best down jacket for your cold-weather needs, from casual to professional outdoor models.)
* **Use Case:** Ideal for a more expansive post, giving the user a clear picture of what they’ll find when browsing this tag.

**Key Considerations When Choosing:**

* **Relevance:** The description should clearly relate to the content you’re tagging (posts about down jackets, ideally).
* **Keywords:** Include relevant keywords (羽絨外套, 蓬松外套, 保暖, 禦寒 etc ) to help with search.
* **Brevity:** Keep it concise and to the point. Aim for clarity.
* **Tone:** Consider the overall tone of your website. Is it informative, friendly, or professional? Match the description’s tone accordingly.

I recommend Option 1 as a good starting point, you can adjust it or refine it to match the specific content on your site. Remember to also consider the overall content in the posts of the tag to fully understand your needs.