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 by weather conditions that every golfer faces, from clouds, to rain drops, and lightning bolts, plus buckets of golf balls.