From Rabbit:

Our most technical trail singlet to date. We have alleviated seams where possible to reduce weight and used laser cutting and a bonded construction to create a tailored fit, and uses rabbitLITE on the front and back for maximum quick dry, and rabbitKNIT in the side panels for max ventilation.

• rabbitLITE is made of a magical combination of 96% poly and 4% nylon
• side panels are rabbitKNIT 87% poly and 13% spandex
• Super lightweight & quick drying
• Made abroad, designed in California
• Machine wash cold, air dry, don't bleach, mmkay?