Product: Super SRF

So what is Super SRF and what does Underlay4u think about this product?

Super SRF is a heavy weight rubber and felt 11.00mm thick composition carpet underlay.
Underlay4u recommend this product for both broadloom & seamed carpets.
Super SRF is very suitable for seagrass, sisal and coir floorcoverings.  The rubber backing offers good grip on either concrete or wooden flooring and allows the sisal/coir or carpet  to bed into the felt

Super SRF carpet underlay is recommended for both heavy domestic and heavy contract usage and is guaranteed for the serviceable lifetime of the carpet when used in recommended locations.

Now for the technical stuff:

                                               
                                          Country of Manufacture:   UK
         Product description: High quality needleloom felt/rubber and suitable for heavy
         domestic and heavy contract locations with excellent thermal and sound
          reduction properties.
                                              
                                     Roll size: 1.37m x 11m

All needleloom felt/rubber products are subjected to a series of tests including flammability & resistance to compression