Exped synmat lite 5 lw description the exped lite synmat 5 lw sleeping pad is nice and warm and comfortable thanks to microfibre filling which was laminated on two sides of exped it is light and very compact pack size the mattress is inflated in no time with the mouth or alternatively with all pump products from exped unlike the normal synmat the lite version has welded brackets this makes them not so much warm and stable but lighter smaller pack size and cheaper the combi flat va