{"niche":"适合长途徒步的最轻量级徒步背包是什么？","description":"What is the lightest weight hiking backpack suitable for long treks?","products":[{"brand":"Superior Wilderness Designs","model":"Long Haul 50L Ultra","price_gbp":278.87,"origin_country":null,"specs":{"weight":"28.6oz base weight","capacity":"50L internal, 60L with outer storage","material":"Ultra 200X or Ultra 100X","number_of_pockets":"3","adjustable_torso_length":"15-21in"},"confidence_score":null,"sources":[{"label":"Superior Wilderness Designs","url":"https://www.swdbackpacks.com/product-page/ultralight-long-haul-50l-internal-frame","currency":"USD","source_country":"US","price":379.0,"price_gbp":278.87,"scraped_at":"2026-08-28T19:55:09.671247"}],"summary":"The Long Haul 50L Ultra is a lightweight, waterproof roll-top backpack with a removable aluminum-stay frame, load lifters, a large front pocket, and two side pockets. Its supportive suspension and customizable torso sizing suit long-distance hikers carrying moderate to heavy loads.","ideal_for":"具备28.6oz重量、50L内部容量、可拆卸铝制支架和负重提升带，在低重量与舒适负重传递都很重要的长途跋涉中，是一个不错的选择。"}]}