Nightmare is a very slow antispin rubber that offers high spin reversal. The slow sponge allows for more control on blocks close to the table. The best spin reversal and disruptive effect you are getting with the 1.2mm version. IMPORTANT- Glue all Der Materialspezialist antispin rubbers with the included glue sheet using the instructions provided. If instructions are not followed, refund claims for damaged antispin rubbers will not be honored.