Two water-ready picks: which one actually suits your next trip?

Display / product clarity

There isn’t a screen here, so the closest useful comparison is how clearly each product communicates what it is and what it’s for. Product B wins on functional clarity because its title and positioning are explicit: it’s a 35L waterproof dry bag backpack with a phone dry bag, aimed at boating, kayaking, canoeing, fishing, rafting, swimming, camping, and snowboarding. That makes it easy to understand exactly what you’re buying. Product A, Helly Hansen Unisex Sport II, is more ambiguous from the title alone; it carries strong brand recognition, but the listing gives less immediate detail about size, use case, or included features. For shoppers who want certainty before clicking, Product B is clearer.

Performance

On performance, Product B wins for water-based outdoor use because its whole design is centred on keeping contents dry and carrying more kit. A 35L dry bag backpack is the sort of thing you want for a full day on a kayak, a drizzly paddle on the Norfolk Broads, or a windy Scottish loch trip where spare layers, food, and electronics all need protection. The included phone dry bag is a practical bonus for UK conditions, where rain and spray are often part of the deal. Product A may be a strong general-purpose Helly Hansen item, but based on the information provided, it does not clearly outperform Product B for wet outdoor carry. If your main job is protecting gear from water, Product B is the stronger performer.

Build quality and design

This is closer than it looks. Product A wins on brand trust and likely build confidence because Helly Hansen has a long-standing reputation in marine and outdoor clothing and kit. With 3,326 reviews and a 4.6/5 rating, it has the stronger evidence base and more social proof, which matters when you’re buying something you want to last. Product B still looks well-specified, but it comes from a less established brand, Ultra Dry Adventurer, with fewer reviews at 1,985. For raw design purpose, Product B is more specialised and likely more practical for wet kit transport; for confidence in brand heritage and proven customer satisfaction, Product A takes the edge. Overall, Product A wins this category narrowly because the review volume and brand reputation reduce buying risk.

Battery life

Neither product uses a battery, so this category does not apply. For outdoor buyers, that’s actually a plus: no charging, no electronics, no failure point. If you want a simple piece of kit that works every time you head out, both are equally strong here. This is a tie.

Price and value for money

Product A wins on value for money. It costs £34.08, which is £5.91 less than Product B’s £39.99, while matching it on rating at 4.6/5 and beating it on review count by a wide margin. That combination is hard to ignore: you’re paying less and getting a more proven product in terms of customer feedback. Product B’s extra cost only makes sense if the 35L capacity and waterproof dry bag backpack format are exactly what you need. If you don’t specifically need the larger dry bag setup, Product A offers the better value.

Game library / features

Translate this to features and versatility, and Product B wins. The 35L capacity is the headline advantage, giving you room for clothes, towel, lunch, spare gloves, waterproofs, and a dry-change bag for after a paddle or swim. The phone dry bag is a useful included extra, especially for taking photos on the water or keeping your phone accessible on rainy UK days. Product A’s feature set is not detailed here, so while it may be excellent in its own right, it cannot match the obvious utility of Product B’s capacity-led design. For feature richness and water-trip practicality, Product B takes the point.

Overall user experience

For ease of use and confidence, Product A is probably the smoother buy for most people because it is cheaper, better reviewed, and backed by a highly trusted outdoor brand. If you want something you can buy with less hesitation, that’s a big advantage. Product B, however, is the more purpose-built option for serious wet-weather carrying. If you regularly head out in the UK’s changeable conditions, where sunshine can turn to drizzle and spray in minutes, a 35L waterproof backpack is genuinely useful. The experience is better for people who need to keep more kit dry on active days.

Overall summary: Product A is the better all-round value and the safer recommendation for most buyers thanks to its lower price, stronger review count, and Helly Hansen brand trust. Product B is the better specialist choice if you specifically want a larger waterproof dry bag backpack for boating and paddling. If you’re unsure, buy Product A; if you know you need the capacity and dry-bag format, buy Product B.