MATTR - cutting edge Materials, Technology and Research. The MATTR range of clothing is designed to offer you everything you need for on or off-course activities in all climates. Designed with a 4-way stretch which allows you a full range of motion, it is moisture wicking and fully breathable to keep you dry and comfortable as you perform. This polo shirt is inspired with an all-over ditsy print featuring the state insect of Oklahoma, the honey bee. The host state of this year's PGA Championship