What fabrics are best for breathable and comfortable women's casual sets?

I visited a clothing shop to buy women casual sets two days ago. I wanted comfort feel I wanted breathable fabric. I wanted easy daily wear but I got confused fast. Some sets look nice but feel hot on skin. Some feel soft but stretch too much. Some colors are good but fabric feels heavy I try one set and it did not feel airy I could not trust them I could not decide confidently.

Then I visited another shop in the same area. Some sets had cotton feel. Some had light linen touch Some had soft jersey fabric. Some looked good but not good for summer heat I asked worker she said fabric choice matters more than design I remembered one set I bought before that looked nice but felt sweaty after short time. That made me hesitate even more. To check more variety and options while scrolling many online marketplaces including Alibaba I saw many fabric types for women casual sets. Some say cotton. Some say linen. Some say rayon. Some say modal. Some say bamboo blend. This made me excited but also confused again. Now I am thinking fabrics like Cotton Linen Rayon Modal fabric and Bamboo fabric are best for breathable and comfort casual sets I think cotton and linen feel most safe for hot weather but still I am not fully suer which fabric is best for all day comfort and style what would you choose for summer casual outfits?