June Tailor rotary mats are unique in that they have a hard surface that the rotary cutter can not permeate. This makes cutting smoother and requires less pushing effort. The hard surface prevents cutting lines in the mat which accumulate with other brands. The hard surface also prevents fibers from sticking in the cut grooves. Another key feature is that the inch measurements are an inch from the edge of the mat and are printed on the inside and outside of the outer grid. June Tailor mats are weather safe-they will not warp crack or peel even in extreme heat. 45 and 60 degree cutting lines. Teal color with white markings that make it easier to measure and cut. Perfect for retail cutting areas BR -each 1/4 yard is highlighted for quilt fabric placement.