Prolonged Temperature Retention: 8mm foam padding with reflective PEVA lining maintains ideal temperatures for about 20 hours Rigorously tested for execution during beach trips, hiking excursions, or city outings Practical Organization Features: Includes a front insulated pocket for utensils, two side sections for water bottles, and a front pocket for small items Comes with a built in bottle opener for added convenience during trips or everyday use Spacious 52 Can Capacity: This backpack provides generous interior space measuring 17.7X12.9X7.9 Inches, designed to hold 52 standard 330ml beverage cans along with food containers The top stretch cord ensures safe storage for extra gear like jackets or blankets, perfect for different leisure activities Water & Strong Build: Made from coated polyester fabric with full PEVA lining to block Tight seal closures better defense against liquid spills and weather humidity Easy Care & Comfortable Wear: The design includes adjustable padded shoulder straps for supportive comfort without unnecessary bulk Sturdy construction allows simple cleaning while effectively carrying heavy loads