binding which stitches the top and bottom ticking panels to the panels on the
side of the mattress.
By contrast, the a single layer of vinyl does not have the tensile strength
of nylon and will tear more easily. Unfortunately this attribute seems to worsen
with time.
The failure mode of mattresses is the tearing of the cover, generally along a
side seam. (This comes about because every child eventually turns the crib into
a trampoline)
A child who jumps on the mattress puts a lot of pressure on the seam and an
inferior cover will split.
Look for a mattress with a nylon reinforced cover.
3. Construction
Mattresses can either by innerspring (Coil) or Foam.
The top rated mattress is the Classica I foam mattress by Colgate.
This foam mattress weighs only seven pounds, has a tough triple layer nylon
reinforced cover, and is very firm. There is a ten year manufacturer's warranty.
The clear advantage of the light foam mattress is the ease with which the
crib sheet can be changed. Keep in mind that the mattress ends must be lifted to
pull off a dirty sheet and lifted again to put on a clean one. Clearly, lifting
a seven pound foam mattress is easier than lifting a thirty-two pound
innerspring mattress.
Colgate also makes the Classica III mattress which has a firm side and a
medium firm side. The firm side is used initially when it's critical for a
newborn to sleep on an extra firm mattress, and then as the child grows the
mattress can be turned over for a more comfortable sleep.
For those who are predisposed to a coil mattress, we recommend the Simmons
Maxipedic, the Colgate Crown Imperial III or the RT mattress.
All are firm, have nylon reinforced covers, heavy gauge coil springs and a
ten year or more warranty.
If you are considering an innerspring mattress, check to see that it has a
good edge rod. The rod is a heavy gauge wire which exists at the top and
bottom of the mattress at the point where the side panels are stitched to the
top or bottom panels. The rod extends the life of the mattress by keeping the
jumping child's feet from compressing a single spring far enough to stress the
fabric and create a tear in the fabric seam.
Consistency
During the two or more years a child sleeps in the crib, they
will change from a newborn, unable to turn from side to side to a toddler
capable of standing, walking, and jumping.
After they are able to move around in the crib on their own,
babies will change positions frequently during sleep, even turning from end to
end, sometimes sleeping at the very edge of the mattress and sometimes in the
middle. Thus all areas of the sleeping surface should be consistent in its
firmness. Feel the mattress to see that there are no soft spots and that is
firm at the edges.