as far as I know we bought a lot of cotton from the USSR and then we sold textiles and clothes in the opposite direction
Soviet Uzbekistan was a world leader in cotton production - producing more than the USA and India. This is what led to the drying up of the Aral Sea - unfortunately.
So not only you, but the world bought Soviet cotton.
-//-
Since yesterday, I found some papers on USSR-PRL trade, and it was actually quite interesting. Learned a good bit about what "trade" between socialist economies was supposed to look like. Basically - it always had to balance, more or less.
Within COMECON, the USSR specialized in providing Poland with raw materials, energy, and heavy capital goods.
Poland was socialized in producing processed consumer goods, light industrial output, and transport equipment.
So... the USSR sent:
1) Agricultural goods: first and foremost cotton. But also grain (mostly for animal feed).
2) Raw materials: oil, natural gas, coal (yes coal! I was surprised too), iron ore, non ferrous metals.
3) Heavy industrial equipment: turbines, mining equipment, steel plant components, machining equipment for defense industry
Poland provided:
1) Light industry products: clothes, furniture, cosmetics and toiletries
2) Shipbuilding: Poland was the COMECON shipbuilding giant. Gdansk, Gdynia, Szczecin produced cargo ships, oil tankers, fishing trawlers, icebreakers, and military ships.
3) Transport: railcars, trams, diesel engines, buses.
4) Industrial components: bearings, tools, electrical equipment.
Both sides would get f*cked. USSR supplied raw materials for a fraction of their global market cost, and Poland sent back goods for a fraction of their actual worth.