Effective for a reasonable price

I live in a building with poor insulation and noisy neighbors. So the great evils great remedies, having no hope of instilling the knowledge to live wild and often with staggered working hours, I opted for pragmatism and I bought this helmet to finally take a nap or to bed early the night. So I do not know the shape I must have in my bed (lol) but it's better than corks and even very effective in addition to these. After it's true that it serves the head and that beyond 2 hours it starts to be uncomfortable but I think that contributes to its effectiveness and for me it is essential.