petercool 发表于 2014-7-11 14:08 * t7 K# V+ I2 o* o6 y, H- v
这个不好,三层都是form,没有内置独立弹簧,也就是pocket coils,更不是bi-level的pocket coil了,时间长了 ...
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. M( j8 M# k2 a+ bAll seahorse mattress are foam. there is no any pocket coils. they can stay firm for many years. ' ^; H) U- K1 S: `5 Z9 s7 \7 X7 a/ [6 W. O* y" Z4 M2 x: i
Is there any difference between seahorse foam and sealy foam?