The YETI Hopper M20 Backpack Soft Cooler lets you carry a day's worth of food and drinks hands-free by wearing it like a backpack. The MagShield Access closure uses a strip of ultra-strong magnets that open wide for easy loading and snap closed with a gentle push to help keep the cold locked in. Its DryHide Shell is a high-density fabric that resists punctures and UV rays, and both the interior and exterior materials are treated to resist mildew. Inside, ColdCell Insulation, a closed-cell foam, offers strong cold-holding capability, while RF-welded seams create a leakproof liner. The HitchPoint Grid lets you securely attach a Sidekick Dry Gear Case or other small gear, and a slim, tapered design with ergonomic, double-stitched straps makes it comfortable to haul even when loaded down. YETI notes this product should not be left open around animals due to entrapment/suffocation risk, is not compatible with dry ice, and contains magnets that may interfere with pacemakers.