Reported capacities include 15 L, 21 L, and 30 L — so the listed volumes span approximately 15 to 30 liters.
Sizes and weights vary by item. Examples reported include a bag at about 20" x 10" x 19.3" weighing 6.1 lb, and hard cases around 11" x 9" x 48" at ~8 lb up to 11" x 12" x 48" at ~14 lb — so the listings span those approximate dimensions and weights.
Hard travel cases are described as blow-molded, rigid shells that provide impact protection; fabric bags call out water-resistant coatings or abrasion-proof nylon (for example, water-resistant or abrasion-proof nylon) for weather protection.
Yes — some bags include removable tackle trays or boxes for organizing lures, and at least one listing includes a removable rain cover for extra weather protection.
Care instructions vary or are unspecified: some entries explicitly state "Care Instructions Not Provided," while others list notes such as "Do Not Wash" or "Do Not Bleach."