If you’re after a like-for-like storage solution, the main product is still the best match: a 35L waterproof backpack-style dry bag with a phone pouch, ideal for keeping kit dry on the way to the slipway, beach, or campsite. But depending on what you actually need, these alternatives may suit you better.

Helly Hansen Rider Vest Buoyancy Aid (Ebony, 60 to 70 Kg) — £41.49, 4.7★

This is a totally different type of product, but it’s a smart alternative if your priority is safety on the water rather than dry storage. Compared with the dry bag, it doesn’t carry your kit, but it does give you proper buoyancy for kayaking, canoeing, dinghy sailing, or paddleboarding in cooler UK conditions. What’s better: it’s from a trusted watersports brand and offers peace of mind on exposed estuaries, lochs, or coastal paddles. What’s worse: you’ll still need a separate dry bag for valuables and spare layers. Choose this if you already have luggage sorted and want to upgrade safety first.

Helly Hansen Rider Vest Buoyancy Aid (Ebony, 70 to 90 Kg) — £41.49, 4.7★

This is the same idea as the 60–70 kg version, but sized for a different paddler. It’s the better pick if you’re in the 70–90 kg range and want a buoyancy aid that fits correctly, because fit matters hugely for comfort and effectiveness. Compared with the dry bag, it won’t protect your phone or lunch from spray, but it’s much more relevant if you’re paddling moving water, cold British harbours, or doing any activity where a buoyancy aid is recommended. Best for anyone who values safety and fit over storage capacity.

Helly Hansen Unisex Sport II, Red, XXS — £32.84, 4.6★

Another buoyancy aid option, this one is a cheaper alternative and could be a better value if you’re buying on a tighter budget. It compares well on rating and is likely the best pick if you need a compact PFD for smaller users or a junior/XXS fit. What’s better: lower price and still a reputable brand. What’s worse: again, it’s not a dry storage solution, so it won’t replace the main product if your goal is to keep kit dry on rainy UK days. Choose this if you want a more affordable safety-first option.

AIRBANK Electric SUP Pump Puffer Pro 20 PSI — £107.09, 4.6★

This is only an alternative if your real problem is getting your inflatable SUP ready quickly. It’s not a substitute for a dry bag, but it’s a brilliant companion product for paddlers who are tired of manual pumping before a session. What’s better: fast inflation, rechargeable battery, and auto shut-off for convenience on windy car parks and cold mornings. What’s worse: it’s much more expensive and doesn’t help with carrying dry gear. Choose this if you already have your storage sorted and want easier setup for inflatable boards.

AKASO EK7000 Pro 4K Action Camera — £56.99, 4.4★

If you’re searching because you want to document your boating, kayaking, or wild swim adventures, this is the most fun alternative on the list. It’s waterproof and comes with accessories, so it’s a better fit for filming sessions than a dry bag ever could be. What’s better: captures your time on the water, including surf launches, river runs, and summer paddles. What’s worse: it doesn’t protect your belongings or carry anything. Choose this if your main goal is recording the adventure rather than storing kit.

Overall, the original 35L dry bag backpack is still the best all-round choice for keeping clothes, food, and electronics dry on UK waters and weekend trips. But if you need safety, faster SUP prep, or action footage, one of these alternatives may be the smarter buy.