Nrr is 22...not 31 as written - Walkers Low Profile Folding Ear Muffs

I bought this thinking that I would be getting a 31 NRR rating ear muff at a very slim design. Turns out that it is not 31 NRR but rather 22. Hard to find this info, but happened upon someone else's review in which he said it did not offer adequate protection and then realized it had a lower NRR rating. Even if you double up on ear plugs, you only get it up to a 27 NRR. I would recommend you get the true 31 NRR Walkers passive ear muff sold on Optics Planet. I will be returning this product so that I can exchange it for the true 31 NRR. Luckily Optics Planet has a great return policy.