Why are hotel mattresses so soft?

The main reason is that the waist diameter of the spring is relatively large, the waist diameter is large, the elasticity is good, the waist diameter is small and hard. The waist diameter of ordinary mattress is less than 3CM, which saves materials. Hotel mattresses are basically 3.5CM in waist circumference and 6.5-7.5 in caliber. Soft mattresses are more elastic and more durable than hard mattresses. Foreign markets like soft mattresses. Some mattresses will be softer without a few rows of springs, but they will collapse. Good mattress: All springs should be 1.8X2.0 22X3 1 row.