hi rayla,
There are some “defects” or imperfections that are “normal” with latex and some that aren’t. You can get an idea of the type of imperfections that are considered normal here as a reference point.
Hopefully they are not re-selling comfort exchanges but that would surprise me.
A double sided mattress (of any material) is a mattress that has a support core (innerspring, latex polyfoam etc) and then the comfort layer (usually the same) is added to both sides and the mattress is then finished with a quilting and cover that is also identical on both sides. In other words each side would be suitable for sleeping on rather than just one side of the mattress which is more common.
Yes … a two sided construction allows a mattress to be flipped instead of just rotated so that each side has a chance to rest and recover and is only used half as much. While latex is the longest lasting of the foam materials … having a two sided mattress can help even a very durable mattress to last longer. The only “disadvantage” to this type of construction is that the comfort layers on each side are a little more restricted in terms of the thickness and layering that can be used because if they are too thick then the comfort layers on the bottom of the mattress can affect the support qualities of the mattress. Done well … a two sided mattress can be a “value added” feature. The extra materials used on each side and in finishing a mattress on both sides adds to the cost of manufacturing and of course the price of a mattress compared to the same mattress that is one sided.
Los Angeles has more manufacturers than almost any other area of the country and there are some very good choices there including one of our manufacturing members called Flexus which like all the members here I consider to be among the best of the best in the country in terms of quality and value. The Los Angeles list is in post #2 here.
Phoenix