Thank you for viewing. This is the Zpacks Multi-Pack UL Multi-Pack. It's a multi-functional pack that allows you to attach straps to various locations. ★ Brand new, unused ★ Immediate purchase OK. The following is a translation of the product description from the Zpacks official website: A popular and versatile 4-in-1 backpack accessory from Zpacks. Configurations: 1. Clip it to the top of your backpack and use it as a lid. 2. Hang it on your shoulder straps and use it as a chest pack to carry water or balance a large camera or backpack. Two 1-quart (946 ml) Powerade bottles or Nalgene bottles fit perfectly. 3. Clip the removable belt to the center attachment and carry it as a fanny pack/belt pack. Perfect for carrying a 1-quart bottle, a small jacket, and snacks around your waist. 4. Clip the removable belt to the top corners and carry it over your shoulder as a satchel. Convenient for carrying water from camp to a water source, or for carrying accessories while traveling or in town. Features: Compatible with most backpacks. Waterproof zippers and taped seams to prevent water ingress. (It is recommended to put electronic devices in a Ziploc bag as a precaution). Six attachment points with side-release buckles for different carrying styles. All straps can be removed when not in use. Additional straps are available for quick switching of the Multi-Pack between backpacks. Dimensions: 23cm x 20cm x 7.5 cm Capacity: Approximately 3.5 liters Weight breakdown: Multi-Pack without straps: Dyneema® Composite Fabric 39 grams | Robic 39 grams 2 upper attachment straps 10 grams Removable belt 25.5 grams 2 additional belt clips 10 grams Total including all straps 85 grams