When I received the Sea to Summit Reactor sleeping bag liner, I first wondered whether it would really be a necessary piece of kit. Usually, a sleeping bag liner isn’t something I’d routinely ...

Betty the Backpacker has learned the hard way that having the right kit in the backcountry changes the game. And Sea to Summit’s gear ranks near the top of her must-have sleep system.

Just 522 feet (159m) from sea to summit, Arnside Knott pops up in the tiny Arnside and Silverdale Area of Outstanding Natural Beauty to claim the title of ‘smallest Marilyn’ (the 1557 peaks in ...