How to judge quality with your hands
Short answer: Take hold of the fabric, feel the weight, pull lightly and see whether it springs back. Three seconds tell you more than a description does.
Weight first
Lift the garment. A fabric that feels heavier than it looks is more densely knitted and usually lasts longer. A fabric that feels almost weightless is thin and becomes see through and worn sooner.
Stretch next
Pull the fabric lightly across and let go. If it springs back immediately, there is elastane in it and the garment will hold its shape. If it stays stretched, the garment will give through the day. See bamboo t-shirts for men.
Surface last
Run your hand across the fabric. If it is smooth and even, the yarn is finely spun. If it is uneven with visible nubs, it will bobble sooner. See bamboo clothing for women and bamboo underwear for women.
Frequently asked questions
Can you feel the price
Not directly, but the three tests tell you something concrete whatever the garment costs.
What does it mean if the fabric is shiny
Often fine yarn or filament. That is not bad, but it is more delicate.
Is heavy always better
No. For summer clothes and underwear, light is often better. Judge by purpose.