You can see the difference between Birko-Flor and Birkenstock. This is an example. They look good and fit well (I use slim ones so a slim one fits me fine) but are a bit stiff. Not like the more expensive brand but I knew that when I ordered it.
π KEEN Men's Austin Brindle Bungee: Stylish and Comfortable Footwear for Active Men
9 Review
π Crocs Unisex Classic Translucent: The Epitome of Comfort and Style
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π Ultimate Comfort and Style: CERYTHRINA Breathable Outdoor Walking Slippers for Men's Shoes and Mules & Clogs
10 Review
π Stylish and Comfortable Crocs Unisex Ralen Lined Black Men's Shoes: Perfect for Everyday Wear
9 Review