A lightweight bag can come in many different forms, each with their own unique characteristics. Some synonyms for a lightweight bag include: backpack, satchel, tote, messenger bag, sling bag, duffel bag, hobo bag, and fanny pack. Each of these types of bags has their own design and functionality, but all are lightweight and easy to carry. Backpacks and satchels are great for school or work, while totes and messenger bags are perfect for daily errands. Sling bags and fanny packs are great for outdoor activities, while duffel bags are perfect for travel. Whatever your needs, there is a perfect lightweight bag out there for you!