Serendipity you do talk waffle sometimes

Designer labels do usually use better quality processes and materials but so do m&s, debenhams, house of fraser and other department stores. With designer labels you may even find it counter productive with them not catering for different body shapes

Places like primark, top man, and maybe brttons a little, use cheaper materials and processes which usually don't fit anyone very well.

At the same time shop to what your budget allows, if you can only afford primark it's all good