What to expect from bamboo long underwear
Short answer: Bamboo long johns are close fitting underpants for cold days that feel soft and smooth against the skin. They add an extra layer of warmth under trousers, and over time the waistband, knees and crotch are where use shows. Gentle washing keeps them going longest.
What long johns should do
Long johns are worn as the innermost layer under trousers when it is cold. They should fit close without squeezing, lie smoothly under other clothes and not add too much bulk. Long johns made from bamboo viscose are knitted with elastane so they follow the legs. Viscose can absorb moisture and feels comfortable as you move from the cold outside into warmth indoors. See bamboo long johns for different styles.
Warmth and layers
A thin layer of long johns does not give the same warmth as thick wool, but it makes a noticeable difference under a pair of trousers on a cold day. Warmth depends a great deal on layering and on keeping the skin dry. For hard physical activity in freezing conditions many people prefer wool, while bamboo long johns suit everyday wear, work, walks and time outdoors in moderate cold. It helps to know the difference when choosing.
Fit and knees
Because long johns fit close, the fabric stretches at the knees every time you bend your legs. Over time small bags can form at the knees, especially on thinner styles. They often recover after washing. Choose a size that fits close without squeezing. If they are too small, the fabric is overstretched and wears faster. If they are too large, they form folds under your trousers that can feel uncomfortable during the day.
Waistband and crotch
The waistband keeps the long johns up and ages with hot washes and tumble drying. Over time it may loosen a little. The crotch takes friction as you walk and can thin with time. That is normal for all close fitting underwear. Wash at 40 degrees and let them air dry so the elastic keeps its stretch longer. Avoid fabric softener, which can reduce the fabric's ability to absorb moisture.
Use through the season
Many people wear long johns heavily through the winter months and put them away for the rest of the year. That means wear is concentrated into a shorter period. With two or three pairs in rotation, each pair takes less wear. Store them clean and dry over the summer. Many people use the sale for men to add more pairs before winter arrives.
When to replace them
Long johns are worn out when the waistband no longer holds, when the fabric thins at the knees or crotch, or when seams start to give. How quickly that happens depends on how much you wear them and how they are washed. A pair worn only on the coldest days will naturally last many seasons. See also the sale.
Frequently asked questions
Are bamboo long johns warm enough for freezing weather
They make a good extra layer in moderate cold. For hard activity in severe frost many people prefer wool.
Do bamboo long johns shrink
A little with hot washes and tumble drying. Wash at 40 degrees and air dry them.
Why do they bag at the knees
The fabric stretches when you bend your legs. The bagging often recovers after washing.
You can find the full range at Bamboo-Clothing.com.
