Medium fits 100 - LX Series. Large fits GT - X Series. Heavy duty fabric wont't shrink or stretch and is coated for Heavy duty protection for riding mowers. WipeClean™ reinforced bottom around mower deck. EasyOn™ side handles makes snugging down cover a snap. Dual reinforced air vents let air circulate and help prevent ballooning in winds. Interior lining and integrated muffler heat shield. Heavy duty fabric won't shrink or stretch and is coated for maximum water resistance and repellency. EasyOn™ split back for fast fitting and easy access after installation. Handy storage pocket reverses into an attractive storage case. Two year warranty