Something to share.
Types of mattress.
Foam (2'-4')- what we usually see at pasar malam or furniture shops. ( like the bb mattress at kiddy palace) Light in weight, dun trap heat easily, hardness depends on thickness, but gets thin/flat easily as its light in density.
Hi-density foam (2'-4') - ditto as above but harder den foam (denser) but dun last long as well. (Reccomend for toddler use, cheap so can throw when dirtied)
Latex (3'-12') - Made of rubber, its heavier than foam. Traps heat so sleeper will feel hot, hardness increases w thickness, can last longer(thick versions). Generally good for long term use as material hard to deform. (thick version)My brother who weighs >80kg uses a s.single latex mattress for > 5yrs.
Spring (4'-12') - Spring sandwiched between latex/foam/padding etc. The more the spring, the firmer the mattress, the thicker the layers on top and below, the better protection the spring is given. Cheap spring mattress are usually of lesser spring and thinner coverings, thus will give way in shorter time. Choose models with more spring and thicker padding.
Pocketed spring (6'-12') - Ditto as above, but spring are individually 'wrapped'. The additional 'encasement' gives the entire mattress more support. (Less chance of bed 'caving' in). Some brands manufacture these with high quality padding/latex, thus bed are firmer and yet still have the 'springy' feeling when laid down. Reccomended to be 'flipped' couple times a year to prolong usage. My parents slept on 1 for over 20yrs.
Sealy is a US brand, and american's as we know weighs heavier than petite asian. Therefore, their beds are more 'heavy-duty'. But, closer study will show u that there are other brands that use the similar 'system' which means the quality equals to Sealy but price may be lower.
Brands is actually not the most important, the kind of mattress selected is. U may b buying a branded spring mattress but it may not outlast a lest known brand pocket mattress.
So, shop around and u may find better bargain with the 'cheaper' brands. ^_^