YETI. HOPPER SIDEKICK WATERPROOF DRY BAG. FOG GRAY. The SideKick Dry is designed to keep the important things accessible secure and 100 percent dry. This waterproof gear case is the worry-free way to carry your keys wallet fishing license and phone in the wild. It s constructed with a powerfully magnetic HydroShield Closure and RF-welded seams that repel any sign of wetness. It also attaches to the Hopper family s HitchPoint Grid to safely keep your gear within easy reach.