The product is called “Purflo Purair Breathable Cot Bumper”. This product states that it:
It arrived in a zip up plastic bag which you could put it back in when not using to protect it from dust. It comes with two bumpers which are designed to go along the length of the cot rather then at the top where the babies head is. They have velcro on the ends to wrap around a bar to keep it in place and they sit down next to the mattress
This didn't arrive with any instructions which seems like it is simple enough but I put it on completely wrong and at the top and bottom like my other one so my little man was loving watching me looking silly and my partner was laughing at me as I was fighting with this cot bumper! When I finally got it on correctly after my partner showed to do it it looked very nice. The only thing I did not like about it was the fact it was the length of the cot as I could not see in to the cot from my bed through the bars.
This cot bumper is priced at nearly £40 which isn't two bad as you get two bumpers for both sides and my original bumper cost about £25 and just covers the top end of the cot. I have looked for a matched top cot bumper but they don't sell one which would be a downside for me as my little man has a tendency to scooty his bottom up the cot till his head is touching the top. The other issue I had was I could not put his mobile on without ruining or catching the cot bumper.
They also do matching products like sheets, sleep bags, covers etc