As a general rule, I avoid running against strong currents, but often use the current to work the plug in the strike zone by running parallel to fish-holding structure like bridges, rips and shoals
If youre concerned about weight, you may want something else
It uses a layer of softer, less dense, foam next to the head, with cones or pyramids of the softer foam sticking up into the layer of harder, denser foam in the outer layer
20L Plastic Rotomolded Foam Fish Ice Cooler Box Size: 55.5 cm (L) x 34 cm (W) x38 cm (H) Weight: 7 kg Material: LLDPE/TPE Zhejiang Gint Vacuum Flask Technology Co., Ltd
Considering its hardware, materials, and craftsmanship, I actually think its a fair price, though nearly-$400 is still a lot to spend on a backpack for most people