Q: How long does the sweat-blocking effect last?
A: The sweat repellancy properties of the outer layer of the fabric are built on nanotechnology-based molecular reactions within the fabric itself, not spray-on chemicals. So even after 100 washes, significant sweat repellancy remains an intrinsic property of the fabric.
Q: The shirt is water repellent on the outside. How can it be cleaned in a washing machine? Doesn’t the water just bounce off?
A: While the shirt may be water repellent, dirt, dead skin and other microscopic particulates can still stick to it in some cases. Water will simply remove the adherent gunk that happens to attach to the outer layer over time. Of course, the inside of the shirt is water absorbent, so detergent has the typical cleaning effect here.
Q: Are the shirts water-proof?
A: No they are water repellent. If they were water-proof, they wouldn’t be breathable and you would not be able to cool off your body or evaporate the accumulated sweat. You would literally be swimming in your own sweat.
Q: Water-proof and water repellent, what’s the difference?
Water proof means that no water can go through at all regardless of the pressure applied. This usually involves sealing the fabric with a water impenetrable membrane. Doing this however sacrifices breathability and also significantly reduces the stretchability of the fabric and this is unacceptable for an undershirt. Ever try taking off a non-stretchable sweat-soaked undershirt? Not a pleasant task. And being able to rid yourself of sweat through evaporation with the help of a breathable fabric is essential to keeping cool.
Water repellency means that water beads off the fabric and is prevented from going through, but water vapor and gases can still pass. However, if the pressure of the water is high enough, e.g., if the water hits the fabric at a high velocity, it will pass through. This is obviously not a problem as far as blocking sweat is concerned, unless of course you shoot out sweat drops at speeds faster than rain drops in a thunderstorm.
Q: Are the shirts oil-repellent?
They are oil-repellent to some degree. Oil from the skin is primarily absorbed into the inner sweat-absorbent layer of the fabric, where it stays until washed.
Q: Does the shirt require any special treatments such as ironing or special detergents to make it work?
A: No, you treat the shirt as you would any other shirt. No ironing or special detergents or treatments necessary.
Q: What are the washing conditions?
Wash in water under 40 degrees C and line dry. You will find that by the time your shirt comes out of the spin dry cycle of your wash, its already nearly dry!
Q: Are there any things I should not do regarding the shirts?
A: The only major thing to avoid is the use of fabric softener, which may decrease the effectiveness of the water repellency effect. Also, while dry cleaning may not harm the shirt’s effectiveness, it is best not to dry clean just to be safe. It is also unnecessary.
Q: Are the undershirts see-through?
A: No. NanoDri Sweat-blocking undershirts are thin enough to wear under regular t-shirts or button-downs, but thick enough to not be see-through; thus, you can either wear the shirts as you would a traditional undershirt or on their own or with an open button-down shirt.
Q: Do the shirts block sweat from coming through all over, or only in the underarms?
A: The shirts have all-over protection.
Q: Do you have women’s sport shirts?
A: While we presently sell both men’s and women’s undershirts, for sports shirts, only the men’s are available. We may change this if demand warrants.
Q: Is the fabric safe?
A: NanoDri fabrics are EPA and FDA compliant. We use similar chemicals as some of the major clothing labels that sell water repellent jackets and other outer garments. The difference is in the patented fabric processing, which is where our Japanese partners come in. We can make very thin stretchy materials water repellent and have the effect retained through more than 100 washes.
Q: Why do you use polyester to make the shirts? Why not cotton?
A: Polyester has gotten a bad rap over the years and is associated with scratchy, uncomfortable unappealing clothing compared to natural fabrics like cotton, bamboo or micro-modal. But there's a reason why billion dollar companies like Nike and Adidas use polyester for nearly all of their sports wear. It isn't because its cheaper. In fact, polyester is more expensive to import than natural fabrics like cotton. The fact is that polyester is simply the best fabric to use if you want quick drying high performance wear, and this is especially true for heavy sweaters, who need to shed excess sweat fast through evaporative cooling through the quick-drying properties of polyester. And with today's advanced fabric technologies, micro-polyester is even softer than the softest micromodal on the market.