Modal vs bamboo and which feels softer in underwear
Short answer: Modal vs bamboo is a closer contest than most people expect, because both are regenerated cellulose fibres that drape softly and feel smooth. Modal comes from beech wood and bamboo viscose from bamboo, and which one feels softest is personal and depends on the quality and the knit.
What modal and bamboo have in common
Both modal and bamboo viscose are made from plant cellulose that is dissolved and spun into new fibres, and both give a fabric with a soft drape and a smooth surface. That is why they are often used in underwear, where the fabric sits close to the skin all day. See bamboo underwear for women.
Where the two fibres differ
Modal is typically made from beech wood and bamboo viscose from bamboo, but both are processed into a viscose-like fibre. In practice the difference in the fibre itself is often small, and how the fabric feels depends more on the yarn, the knit and the finishing than on the name.
Modal vs bamboo in everyday wear
When you compare modal vs bamboo in a drawer, it is normally the quality that decides what feels softest. A close, fine knit feels softer than a coarse one whatever the fibre, so compare two pairs of the same thickness and fit before you choose.
Stretch and fit
Both modal and bamboo viscose are often blended with elastane to give stretch, and it is the elastane that lets the underwear follow the body. Look at the blend and at how the briefs sit when you move, rather than only at the name of the fibre.
Washing and caring for both fibres
Both fibres should be washed gently at a low temperature and preferably not dried in the tumble dryer, because heat and hard pulling can make them lose their shape. Use a wash bag, follow the label and hang the underwear up to dry, so the fabric keeps its soft feel.
Durability and pilling
Very soft fabrics can become a little fuzzy over time if they rub against rough surfaces, whether they are made from modal or bamboo. Wash them inside out and without heavy clothes so the surface stays smooth, and rotate between several pairs to limit wear.
Mixing the fibres in one drawer
There is no reason to choose one fibre for everything, and you can happily keep both modal and bamboo in the same drawer. Combine them by what feels good at each part of the day, and remember that a bamboo T-shirt for women can be worn on top.
How to decide for yourself what feels softest
Buy one pair of each and wear them in turn, ideally in the same situation, so you can compare without the mood of the day getting in the way. Feel the seams and edges, and think about what you will use them for, or whether you want bamboo tennis socks for women in the same softness.
Frequently asked questions
Is modal softer than bamboo?
It depends on the quality and the knit, not only on the fibre, and both drape softly. Compare two pairs of the same thickness and fit, and feel for yourself which one is best.
Are modal and bamboo the same thing?
Nearly, since both are regenerated cellulose fibres, but the raw material differs, as modal comes from beech wood and bamboo viscose from bamboo. In use they often feel similar, and the differences lie in the yarn and the knit.
How do I wash modal and bamboo?
Both are washed gently at a low temperature, ideally in a wash bag and without the tumble dryer. Always follow the label, because it decides what your own underwear can take.
