G'day Kath,

Realistically you can use any mattress you like on a stretcher, ideally you'd want one that fits inside the boundary of your stretcher frame but it's not absolutely essential.
These mats are pretty narrow so you shouldn't have any issue with them.  In terms of a larger size, we generally recommend having two single mats on a double/queen stretcher to mitigate the raised ridge pole down the center.
Unless you have a really thick camp mattress, the pole in the middle usually creates a peak that has people rolling off to the sides.
Hope that helps!

G'day George,

If your Sim 3.8 Mat has a flat valve as per the 3rd photo on our product page, the Widget is definitely compatible.
Older models may have a different valve, in which case we cant be sure if it would work!

G'day Renee,

Thanks for getting in touch, I'm guessing you're looking at the Exped Sim 3.8M and the Sea to Summit Camp Mat SI? If so, then the two mats are indeed very very similar. Exped and STS both use a similar 75 denier polyester, with the Exped feeling very slightly softer. In terms of comfort, they're both 3.8cm thick so you'll get the same level of comfort from both mats. Sea to Summit uses a slightly different cutting mechanism for their foam, as well as a slightly tapered design which leads to a slightly lower weight, and smaller packed size. They both feature a similar valve type, of the same diameter, that you can easily let a small amount of air out of if you accidentally over-inflate it, and both compatible with the Exped Mini Pump, and STS Jet Stream and Air Stream Pumps. Both of these companies make a premium quality product, and we have no qualms equally backing either of these products for durability, comfort and usability. If punctured, both mats are going to feel pretty similar, but can both be repaired in the field in the same manner, so it shouldn't cause more than a few hours of poor sleep if that happened. Having laid on both of them before they feel virtually identical to me.

G'day Jill,

Yes, you can use the Sea to Summit Air Stream Dry Sack with these mats, the valve is the same size.

G'day Shiro,

Both the Exped Sim 3.8M and Thermarest Prolite Plus Sleeping Mats are good options for most conditions. The Exped has a slightly higher R-value so can handle slightly lower temperatures, but is also a little heavier and bulkier, so that might be the defining factor in your decision making. Overall we think both options are great and should suit your needs.

G'day Kasey,

The Exped Sim 3.8 M Sleeping Mat is a self-inflating mat, but to assist with full inflation we do recommend a separate mini pump. You can find them here.

G'day John,

The F60 is 6cm thick and the Sim 3.8 M is 3.8cm thick, so we'd say the F60 will be a little comfier based purely on that. The overall packed size of the F60 is geared toward car camping, while the Sim 3.8M is geared toward hiking, or trips where you have limited space. Both options will be suitable for kids.

G'day Darren,

Yes the Exped Sim 3.8M Sleeping mat is bonded.