Western Mountaineering Summer Coupler

>Does anyone who has used the summer coupler know what the largest pads are that will work in the sleeves?

Chris, I use Prolite 4 large pads with mine. A 25 inch pad is best because it leaves less of a gap between the two pads. I haven't tried any of the inflatables yet though (Clearview, etc).

I don't think you will have a problem with the coupler not being able to accommodate a large pad. The widest 25" pads do fit.

I have sewn the pad sleeves smaller on the coupler to allow a tigher fit for the Big Agnes Air Core 72" x 20" mummy shaped pads my wife & I use.
Dan

Thank you for the information Sam and Dan.