Just a useless thread like a shoelace. Totally of no use . Mrp of each pair is written as 15 rupees so pack of three is of MRP 45 rupees . Actually it is not even worth 45 paise. Total wastage of my 15 rupees. You can do far better than these ear plugs with just your finger in your ear
Each pair comes in a cover that has a little hole at the top left corner. Each pair gets squeezed to small size when we roll and expands back to full size after we leave it. This way we can insert in our ear and let it fill the shape of ear in 30 seconds. Same pair can be used again and again. Then I pour ear drops anytime i feel inconvenience in the morning. However there is some liquid coating initially (maybe glue) which helps it squeeze to small size. But it evaporates after first or second use.
Then I noticed that after using first pair for two weeks, having opened the cover of the three pairs, the air flow evaporated liquid (glue) for remaining two. I am not feeling convenient to use the other two pairs which got dried.
So we need to put the packs of pairs in air tight containers immediately upon receiving. Also when using a pair repeatedly, need to put it back in airtight container after use, in the morning. Otherwise it keeps accumulating dust and turns to black.
It is not large. But not small enough for some people. My wife finds them big to insert in her ears. That's why I tested with this pair of 3.
Overall its quite value. Noise gets reduced, not to zero, but to the point they don't cause inconvenience and assures good sleep.
Only negatives are the evaporation of the coating because of packaging and most importantly, it pains to sleep on the sides with them put on. Need to find some kind of cushion against this. A good cushion other than pillow specifically for the part of ears might help.
I don't know why they need it for industrial use. But for my place where fruit, vegetable, flower vendors, neighbors annoying water motor noise, neighbors loud talks, children noise, all get filtered to the extent of calmness and good sleep.
Without this my sleep got disturbed repeatedly which was slowly deteriorating my cognitive abilities and leading to headache.
I don't put this on in the night itself. I put it on after 6.30am or 7am on waking up from first noise. Then sleep again.
My disturbed sleep patterns are solved to some extent by this. Considering repeated use, cost is not so much. So this is quite helpful.