Described is a fibrous substrate treatment composition having a) 20-99.5% by weight of a silicone polyether polymer and b) 0.5-4% by weight of a cationic surfactant or a mixture of cationic and nonionic surfactant; wherein the silicone polyether polymer has 6-100% by weight of formula (I) or (II) and 0-94% by weight of repeat units from ethylenically unsaturated comonomers;




wherein a and b are integers of 1 to 40 where a+b is an integer of at least 2; c and d are integers of 0 to 20; e is an integer of 1 to 40; X is a linear or branched C1-C4 alkylene group; R1 is a C1-C4 alkyl group; and R2 is —C(R1)═CH2 or polymer backbone unit —[C(R1)—CH2]— bonded at C(R1). Treatments exhibit improved balance of water repellency and oily stain release performance.