Yes - that is the one! thanks. Everything on their online store seems to be about 20% more expensive but I guess its still cheaper than most other options.
I prefer the SIMs but I think it is a personal preference thing. I move around in my sleep a lot, and on an air bed I get v self conscious about distrubing DH as they are so bouncy. This means I try to lie perfectly still... and don't get any sleep. I've always slept sound as a pound on the costco sim but im sure teh red wine fresh air helps.
Has anyone seen the SIMs at Costco? DH ripped on of ours packing up last year so I need to get a replacement but I haven't seen them there yet, though they are selling some of the other camping stuff. Worried they won't have them this year
Also, while I'm on the subject, do you think more expensive SIMs are more durable? The costco ones are super comfy and only about £20 but this did seem to rip increadibly easyily.