Leak-Proof Insulated Cold Backpack

Dimensions: 30 x 20 x 45 cm. Weight: 1.2 kg. Capacity: 25 litres. Outer material: Durable waterproof polyester with PU coating. Inner lining: Food-grade leak-proof TPE film. High-density thermal insulation layer between outer and inner layers. Engineered for dependable performance in variable outdoor conditions, this cold backpack combines three critical protective layers: a waterproof shell, a thermal insulation core, and a fully sealed food-grade interior. Its dimensions support generous packing volume without compromising portability, and its weight remains optimised for all-day wear. Cold retention is sustained via consistent thermal resistance — not just initial chill — allowing it to outperform thinner-lined competitors when exposed to prolonged ambient heat (e.g., summer beach afternoons or unshaded picnic spots). The leak-proof TPE lining eliminates cross-contamination risks from raw seafood or dairy, while the waterproof exterior ensures integrity whether stored in a wet boot, carried through drizzle, or placed on dewy grass. Use cases span practical UK outdoor needs: keeping sandwiches and yoghurts safe on school trips, preserving smoked fish en route to markets, chilling craft beers for festivals, or transporting medical cooling packs during rural home visits — all with consistent temperature control and zero leakage risk.