I bought large size, within one day of use and that too on a partial sunny day and I had boils near the elastic, and other side doesn't have any elastic. When I tried to remove it arm stated to hurt near the elastic area and there was mark in that place.
Thank you for taking the time to give us your review. I have used the same sleeves on my long rides. The mark on the biceps will appear if the sleeve purchased is of a smaller size.
I am sorry to hear the issue you faced regarding the boils/rashes. Our product has passed all toxicology tests to ensure it doesn't cause any boils or allergy to the user. However, sometimes heat/ sweat together on a sensitive skin could react to result in an allergy. If you think that the product is not helping you in any form and if you would like to return the product, please do contact the closest Decathlon store and they can help you.
very nice product