Easy to put on an off, cheap, comes with bell etc. However, our two cats kept losing them (average one every couple of months) and while inexpensive we got too lazy to buy replacements. Helps that ours very rarely bring any animals home, so we figured they are not great hunters and are not a huge threat to wildlife (could be well wrong here though!).
We used the Ancol one for a while
http://www.ancol.co.uk/cat-products/collars-harnesses/break-away-buckles
Easy to put on an off, cheap, comes with bell etc. However, our two cats kept losing them (average one every couple of months) and while inexpensive we got too lazy to buy replacements. Helps that ours very rarely bring any animals home, so we figured they are not great hunters and are not a huge threat to wildlife (could be well wrong here though!).