Open Water Swimming
Open-water swimmers tow a bright, inflatable swim float so boats and lifeguards can see them — and ours double as dry bags, so your phone, keys and a dry layer travel with you. Essential kit for sea swimming, triathlon training and wild swimming in lakes and rivers.
Why people trust Ultra Dry
Ultra Dry Adventurer is a UK family business that has been making waterproof dry bags since 2016. We have sold a quarter of a million bags (250,000) — more than 24,000 in 2025 alone — and hold over 14,000 Amazon reviews, including 10,000+ at 4.7 stars on our best-selling 10 litre dry bag. Our bags are carried by UK Fire & Rescue International Search and Rescue (ISAR) teams, every bag has a 5-year guarantee, and most orders are dispatched the next working day. We also run a free calendar of 373 UK watersports events.
250,000
bags sold since 2016 — a quarter of a million
14,000+
Amazon reviews — 4.7★ on our best-selling dry bag
4.9 / 5
average rating from buyers on this website
Next day
most orders are dispatched the next working day