Outdoor junkies and sea explorers could have a new buzz.
Sea trekking promises to combine the experience of swimming in the open ocean with snorkelling and freediving, along with a little bit of camping thrown in for good measure.
The key bit of equipment is an inflatable, waterproof kit bag that you can use as a float and to transport your stuff around with you.
Although it's still early days, the emerging pursuit could open up hard to reach parts of the marine environment to a new breed of independent explorer. Or if you'd rather you can join an organised group trip!
Julian Muehlmeier is a big sea trekking fan who This Way Up's Simon Morton spoke to at a local beach to explain its appeal.