10kgs sounds a lot but it's actually not that much if you factor in the fact that if you go on a 2 weeks trip you bring some unnecessary but maybe useful items:

10kgs sounds a lot but it's actually not that much if you factor in the fact that if you go on a 2 weeks trip you bring some unnecessary but maybe useful items: a jacket in case it rains, sweaters in case it gets cold at night, maybe you planned a fancy night, so you bring something less casual than usual, spares, in case it's too hot and you need to change more than once a day or it rains a lot and you can't keep up with laundry/drying etc. I don't usually travel with 10kg of clothes, but I usually travel with a 10kg luggage (clothes + laptop + luggage itself) and in the end it's usually just barely enough to get by.