Materials shown across the options include polyester and nylon. Some styles list the fabric as novelty or canvas in their product details.
Capacity varies by style. Examples in the available listings include about 16 L, 18 L, and 30 L.
Closures vary by style. Many use zipper closures, while some lightweight listings show the main compartment as open or list no closure.
Set contents vary. Some are 2‑piece combos pairing a backpack with an insulated lunchbox; other multi‑piece sets list items like a lunch bag, a water pouch with snap hook, and keychains alongside the backpack.
Weights shown in the listings include about 0.2 lb, 1.0 lb, and approximately 1.13 lb for different styles, so the available details indicate a range of roughly 0.2 to 1.13 pounds.
