Three Layer Temperature Lock Insulated backpack cooler with a threelayer temperature lock. Closedcycle insulation maintains temperature for extended periods, keeping drinks cold and food fresh while outdoors. Adjustable Straps for Comfort Straps allow you to adjust the fit for comfort. The straps make carrying easier on long hikes or around the campsite. Side Pockets for Easy Access Practical side pockets hold water bottles, umbrellas, and other essentials. Provides convenient access to frequently needed items without taking the backpack off. Large Opening Zipper for Easy Access Front pocket features a large opening zipper for quick access. Reach for snacks, drinks, or gear without digging around. Use Scenarios Day hike or long walk: temperature lock helps keep beverages cold and snacks readily available, with side pockets keeping water and small items within reach. Camping weekend: reliable insulation preserves perishables, while straps reduce fatigue during campground setup and activities. Park, beach, or travel day: easy frontpocket access and organized side pockets support quick replenishment and essential item retrieval. Specifications and performance notes Function: insulation with threelayer temperature lock for extended cooling Compatibility: designed as a versatile outdoor cooler backpack for various outdoor activities Size and capacity: optimized for outdoor use with accessible front and side storage Material and construction: built to support outdoor use with durable straps Performance: keeps cold items cold and fresh during outdoor activities, with easyaccess design for frequent needs