VEVOR Tactical Range Backpack for 6 Pistols, Gun Backpack with 6 Independent Pistol Bags & 10 Magazines, Pistol Backpack for Outdoor Hunting Shooting, Range Bag for Handguns Lockable Zipper, Brown

Yes, the zippers are lockable for added security when transporting firearms, according to the product description.

Yes, the back panel is breathable for comfortable carrying. According to the product description, it features an "elastic, breathable back pad" for comfortable carrying.

While the product description doesn't mention anything about the durability of the waterproof material, it does state that the gun bag is made from high-quality 600D polyester, which provides water resistance and durability.

Based on the product information, it does not explicitly mention if the pockets are accessible while wearing the backpack. However, the backpack is designed for convenience and functionality, with multiple compartments and pockets to organize your gear.