Built for strength
The High-Tech spring has a smaller diameter, allowing more springs to be fitted per square metre.
As in the case of Rest Assured's Ortho-Coil units, High-Tech units are double-tempered through heat treatment. There are also further resemblances. Each spring is double knotted - at the top and at the bottom - for extra strength and maximum surface coverage. This provides even distribution of tension across the entire spring, preventing tilting in one direction.
Furthermore, the diameter of the center coils of each spring is smaller that that of the coils at the top and the bottom, to create extra firmness when compressed. Springs are also pre-set to eliminate initial sagging.
Each unit has 30% more springs than required by SABS 1005 of 1979 specification. Weight is, therefore, distributed more evenly over a higher spring count, ensuring greater durability than in the case of normal spring units.
Only high-carbon steel is used, for long-term support.