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. 

Luckily, we've made it easy and convenient for you the find your perfect size.Our "Size charts" show on the product pages contains:1. Sizes in both centimeter and inches for each specific garment.2. Shows how to measure your own shirts to know what measurements that fits you perfectly. General sizing info:• Maximum shrinkage of 5%• If you're in between sizes, we recommend the following for each of our clothing:     1. For t-shirt's and undershirt's, go up one size    2. For polo shirts go down one size.If you are in doubt, please use our fit finder on the product pages.Still unsure? Contact us with your height, weight, and body type and we’ll help you find your perfect size & fit. Email: hello@nosweatclothes.com

All they need is normal clothing care.One of the advantages of our garments is that they do not need special care for their washing and maintenance. You will find that by the time your shirt comes out of the spin dry cycle in the washer, it's already nearly dry.However, some pinpoints for best results:1. Make sure your sweat proof undershirts are inside out when you put them in the washer. This allows the water and detergent to make unimpeded contact with the areas of sweat protection.2. Wash in water under 40℃ on a low cycle with similar colors.3. Line dry. Do not dry clean.4. Always use the recommended amount of your regular detergent.5.Do not use bleach or vinegar.*Please check the care instructions specified on the label of your shirt.