PRODUCT STORY : At the peak of your workout, Mother Nature may try to stop you. Don't let her! When the heat sets in, stay cool with our Woolverino Micro Sleeveless. The range of movement you expect from a sleeveless combined with the extreme moisture wicking power of Merino Wool will keep you going even when the elements try to stand in your way. 1 YEAR WARRANTY Minus33, a division of L. W. Packard Company, Inc. warranties our product to be free of material and manufacturing defects for one year from the date of purchase. Normal wear and tear, negligence, and damage is not covered by the warranty. 30 DAY GUARANTEE If our woolen apparel does not perform to your satisfaction, return it within 30 days for a 100% refund of the purchase price.