Zero Friction's unique design drastically reduces the contact area between the tee and ball. This reduction in surface area decreases the amount of friction producing longer, straighter drives. Independent testing proves that with a 100 mph swing speed, a golfer can gain up to 4 yards of distance and over 5 yards of accuracy. Zero Friction are also safe for golf course mowers. They are constructed of biodegradable corn starch and other natural ingredients. Features an environmentally friendly product with recycled material is rated longest, most accurate tee in independent laboratory tests 3-prong top significantly reduces the contact between tee and ball providing unparalleled distance and accuracy.