Yoko Sac à dos de couverture

I started commuting by bike in London in June 2008, and it was still so light that I didn't need a rear light or a high visibility jacket after work to cycle back home. But now it's suddenly much darker, especially when it's cloudy or raining, so I started wearing a yellow high-viz jacket with a lot of reflective tapes around my back and arms - just like the one that the police officers are wearing on their motorcycle! I thought it'd improve my visibility a lot.However, when I cycled I was carrying a dark coloured rucksack, and I realised about 70% of my yellow high-viz colour was covered by my rucksack. I've done some research when I was cycling behind other cyclists who were in the same situation, and the result was the high-viz yellow/orange colour + reflective tapes were hardly noticeable from behind in a distance if the cyclists were carrying a dark-coloured rucksack!So I looked for a high visibility rucksack cover, and I chose this one. This particular item has two reflective tapes as well as a net pocket, so I put one of my rear flashing lights in it. Now I know the visibility has improved significantly, so I feel much securer behind my back. It has two rubber strings on the other side too, so it would stick to most rucksacks, I imagine. Only a small fault I can think of is that this cover is not waterproof, so your rucksack will probably get wet in the rain.If you need to ride a bike after dark and carry a dark-coloured rucksack, I will definitely recommend this cover to you, especially if you cycle in heavy traffic like in London, and you can let others see you much sooner. Let's improve traffic safety and protect yourself. Good luck!FYI: I can also recommend a waterproof  Hi-Viz Bomber Jacket  to improve your visibility! Hi-Viz Bomber Jacket

This fits my  Berghaus Freeflow 25 litre rucksack  (this one on amazon is slightly different from mine, which is older). Much bigger than that would probably be too big for this to fit.Probably OK for occasional use (which is OK for me), but the stitching looks a bit light if you regularly take it on and off the bag -- I'm talking about the joins between the different colours of material, not the poppers. I haven't used it yet except to try fitting it over my rucksack, so perhaps it would be fine even with daily use. Seeing that stitching stretch so easily doesn't give me any confidence in it, though. I plan to leave the poppers always done up since leaving them that way doesn't seem to make it any harder to stretch it over the bag. Berghaus Freeflow 25 litre rucksack

Bought for my Mum and it's great for waterproofing your bag and keeping visible on dark nights.

Bought for my daughter who cycles a great deal at university.She thinks it is absolutely brilliant - convenient to fit over her rucksack and the contrasting colours and reflectors make it stand out well. Also handy to keep rain out in wet weather.

Very pleased. Got this to replace one I had been given before but I have since lost. It is such a good idea that I had to get a new one. I frequently cycle and motorbike to work in the dark and rain always with a rucksac on my back. This makes up for the lose of hi viz from back. It appears to be sound quality and I have been using it every day since I got it a couple of months ago and it still fine.