This duffel bag is cute and lightweight but what sets it apart from the pack is the waterproofing. It’s billed as waterproof luggage, with welded seams and a waterproof zip.

It’s available in three sizes: 40 litres (£220), 70 litres (£250) and 100 litres (£270), so it’s not cheap. But it’s not your average bag. It’s IPX7 rated. This is rare for a dry bag and means it’s been tested to be submersible 1m deep for 30 minutes.

I tested the mid-sized, 70 litre Transporter Duffel WP 70 in a colour called Mars Orange. In the photos it looks glossy red but it is definitely orangey. The other colour is called Tunnel Vision Grey but is nearly black.

The first thing I noticed on unpacking was how ridiculously light the bag is. This 70-litre bag weighs just 1.12kg. That matters when it’s on your back and also when negotiating budget airlines’ baggage allowances. If Ryanair gives me 20kg (and 70 litres is perfect for 20kg) I want to minimise how much of that weight...